Analysis of the Community Acceptance Factors for Potential Wind Energy Projects in Greece

: The speedy increase in wind parks has brought to light a plethora of conﬂicts. Despite their beneﬁts, there are more than a few who are opposed. The goal of this research is to study and evaluate the causes, so that such a project can take place in conditions of cooperation, mutual interest and proﬁt for society and investors. The method chosen was a survey with approximately 600 responses in Attica, continental Greece and the islands. The data collected were analysed via SPSS on three levels: (i) descriptive statistics, (ii) binomial logistic regression to model the attitude towards wind farms, and (iii) factor analysis to identify latent factors that inﬂuence people’s thoughts. The results show that the NIMBY effect has no signiﬁcant inﬂuence on the acceptance of the project, contrary to expectations. Moreover, the acceptance of a project does not seem to be a class issue, as the analysis showed that attitude is independent of income. The frequency and logistic analysis showed as the main determinants of the public attitude: (i) in a positive way, open and continuous brieﬁng during all the construction stages and minimisation of greenhouse gases emissions (i) in a negative way, the impact on ﬂora and fauna and the lack of trust in the investors.


Introduction
Climate change, scarcity of natural resources and the insecurity of food, water and energy supplies are just some of the environmental problems facing our planet today.Problems that can exacerbate the phenomenon of energy poverty, i.e., the situation in which a person is unable to "enjoy" basic energy goods, eventually leads to serious health and environmental consequences [1,2].
In conjunction with the concept of sustainable development, which includes considerations of inter-and intra-generational equity [3], a longer-term perspective, and the value of the environment in decision-making, it follows that adopting policies that ensure this sustainability is now considered to be a necessity.The concepts of energy justice and democracy, according to which a socially fair energy transition is pursued [4], form the basis of these policies.
In 2019, energy stored globally from Wind Parks (WPs) was nearly 651 GW, with an increase of 10% since 2018, reaching 744 GW in 2020.There are estimations of the total capacity by 2050, calculated at 5044 GW from onshore WPs and 1000 GW from offshore WPs.It is also known that the total capacity required will approach 14 TW by 2050 [5,6].
The current rapid increase in the size of wind turbines has brought to light a plethora of conflicts.Despite the benefits of wind turbines and the need to harness wind energy, there are more than a few who are opposed to such infrastructure.This opposition leads to disputes and, in many cases, is an obstacle to their installation and operation procedures.This subject has been researched, but each study has focused on a unique objective.Therefore, this article

•
To study and evaluate the causes from which all the negative perceptions about WPs arise and

•
To organise in a hierarchy the factors that can reduce conflicts about theseimplementations,

•
To identify the main determinants affecting someone's attitude towards WPs so that such a project can take place in conditions of cooperation, mutual interest and profit for both society and investors.

State-of-the-Art
About twenty years ago, when relevant research started in 1998, most studies focused on the Not In My Backyard (NIMBY) syndrome as the main cause of negative attitudes towards WPs.However, unlike previous research, Wolsink's research [7] presented society's rejection of WPs as a multi-faceted issue.According to him, the factors that influence citizens' opinions about WPs are mainly institutional.Specifically, he addressed the importance of open procedures in land-use planning and, more generally, the possibility of open participation in the approval and planning processes for WPs.Finally, he asserted that politicians, policy decision makers and investors should focus on the proper growth and expansion of projects rather than on citizens' reactions.

Wind Parks and Society
Society's influence in the acceptance and integration of RES projects is a fact, as are doubts about these structures.In particular, fragmented information, mainly from social media, accompanies these conflicts.The prevailing perceptions in the context of the negative impact [8] of WPs on their area of establishment concern the impact on flora and fauna, mainly on local birds, as well as land occupation and the audio-visual nuisances that may occur because of their construction and operation.These perceptions, taken together, lead to the conclusion that the quality of life of the inhabitants and, more generally, the ecosystem of the wider area of the project, will be damaged.
A wind project has impacts on the ecosystem, both during its construction and operation [9].The required fuel used to transport the equipment to the installation site, as well as that used to build the individual parts of the wind turbines, are part of the environmental cost, along with the audio-visual nuisances [10] that may agitate the ecosystem.These nuisances are an event that may cause a split in feelings towards a WP, as there is not a specific direction of public opinion.
Land occupation can also be examined in conjunction with other factors that have been studied and negatively affect the acceptance of a wind facility.In the first instance, it is related to the connection local residents have to nature nearby [11].If this connection is strong, then it is difficult for the project to be accepted, as people find it hard to adjust to changes in their home environment.Moreover, there is a lack of trust in local authorities, and the perception that existing legislation is being violated; it is thought that areas that should be protected or maintained as they are are being illegally occupied [12].
However, there are other reasons leading to the above conclusions, such as a lack of confidence in investors [13], as well as the lack of reliability in the processes of design, development, construction, and operation of these structures.When it comes to a project which means a significant change for a large number of people nearby and, therefore, in their daily lives, a different approach is required, through which respect is shown to them and their environment.
Table 1 refers to nine important already published studies that have taken place in different regions in order to identify people's attitude towards WPs, and also the reasons driving these perceptions.
Table 1.Recent research on the specific objectives, tested, affecting public opinion towards Wind Parks [14].

Case Study Issues Addressed Date and Place
"Mixed feelings on wind energy: affective imagery and local concern driving social acceptance in Switzerland" [15] Aesthetic impact, land occupation-alteration, NIMBY 2020, Switzerland "Social impact of wind energy in the Isthmus of Tehuantepec, Mexico, using Likert-fuzzy" [16] Optoacoustic alteration, impacts on fauna, economic opportunities, lack of information, agricultural benefits.

2020, Mexico
"Forest owners' interest in participation and their compensation claims in voluntary landscape value trading: the case of wind power parks in Finland" [17] Land occupation 2021, Finland "Understanding community acceptance of a potential offshore wind energy project in different locations: an island-based analysis of 'place-technology fit'" [18] Landscape alteration, place attachments and spatial distance, energy security and autonomy 2020, Guernsey, Channel Islands "Adaptive responses to landscape changes from onshore wind energy development in the Republic of Ireland" [19] Landscape alteration/occupation 2020, Ireland "Public perception of offshore wind farms in Ireland" [20] Wildlife, tourism and aesthetics 2021, Ireland "Keep it local and bird-friendly: exploring the social acceptance of wind energy in Switzerland, Estonia, and Ukraine" [21] Ecological and visual impact, ownership, distributional and procedural justice 2021, Switzerland "Not in my back yard or not in my playground: residents and tourists' attitudes towards wind turbines in Icelandic landscapes" [22] Landscape's alteration, NIMBY, economic benefits 2020, Icelandic "Acceptance of wind energy and the role of financial and procedural participation: an investigation with focus groups and choice experiments" [23] Correlation between wind farm characteristics and community characteristics 2018, Germany The formation of mutual trust between investors and society is influenced not only by their direct relationship, but also by the relationship of local authorities with both parties [24].The negative attitude of local authorities towards the project causes citizens to doubt as well, as they are usually represented by local, elected politicians and cannot have direct contact with the administrators and investors.On the other hand, the very positive treatment of wind farms by local authorities usually leads to controversy and mistrust about transparency.
Demographics also contribute to the attitude of the population towards WPs.In other words, there is a general picture that women are the most sensitive to environmental issues [25], as well as young people [26].Lower-income groups tend to be more opposed to these projects because they are busy making a living and do not have the opportunity to engage in the "commons".Moreover, these people usually feel that they have been exploited and treated unfairly, which does not make it easy for them to trust the local authorities or the investors.
Finally, the fact that many fossil fuel power plants are closing and giving way to renewable energy parks, leaving many people without jobs, creates a negative climate with respect to these facilities [27].It is necessary to develop a plan for forthcoming jobs and especially for the sectors in which these people can be professionally retrained.

Pathways to Deal with the Arisen Conflicts
Although negative attitudes towards wind power projects are inevitable, there are ways to address the objections that arise, in order to improve the installation and operation of WPs with the lowest possible tension.It is, therefore, necessary to explore the point of balance between society and investors, as this means that the necessary concessions have been reached by both sides, aiming at achieving the objectives of both parties.
First, it is important to provide comprehensive information and education on the real impacts and benefits of wind power projects [28].These can be more easily understood by comparing WPs with conventional methods of energy generation.In addition, there is a need for continuous information on individual projects, but also on RES in general, as it is an industry that is constantly evolving in terms of the technologies developed for its use.These processes should consider the principle that while RES are clean forms, the technologies used to exploit them are not fully clean.
Besides, the environmental advantages of exploiting wind energy compared to conventional energy production methods are a major argument that could stimulate the acceptance of WPs [29].Energy generation using wind potential initially helps to reduce gas emissions.Also, the energy used for the creation and installation of WPs, is, according to studies, fully restored during the life of a project.
Furthermore, landscape alteration and audio-visual nuisance can be managed initially through careful management of construction works.In this way, violent and intense changes to the environment are avoided, and the ecosystem is given sufficient lead time to integrate the project.Of course, these impairments can also be minimised before this stage, as there are different ways of determining the damage caused by a WP, depending on its technical characteristics and location.By using research tools such as the Spanish method [30] for calculating the visual nuisance of a WP [31], a clear determination of the level of disturbance at each site can be achieved, and thus the best spatial planning and, accordingly, the best technical characteristics of the project.
In addition, it is particularly important to address the issues that are raised by local people who see the facility as a catalyst for accomplishing their tasks.Thus, it is noteworthy that a WP consists of wind turbines that have relatively large distances between them.Given this, there is an opportunity to develop the project site with other land uses such as agriculture and livestock [32].
While WPs are generally expected to adapt to and have less impact on the ecosystem after construction, the same does not apply to the flying populations of the installation area [33].The high mortality rate of avifauna and bats has undeniably caused a great stir, so the need to manage them is also evident.For this reason, various studies are being conducted on how to protect the ecosystem from wind turbines and technologies developed for this purpose which are already in use.By replacing smaller wind turbines with those of greater height and power, a 54% reduction in the mortality of flying species was found in California [34].
More practical ways of dealing with the impact on wildlife are also mentioned.De Lucas et al. [35] referred to the temporary closure of WPs at times when the risk to wildlife is considered to be higher.A 50% reduction in griffon vulture mortality was observed.For the protection of bats, in particular, technology was used to emit the ultrasonic echoes that are perceived by the bats.The number of bats dying decreased by 64% [36].In addition, practices related to the visual protection of species, such as dyeing a fin so it is seen more easily by birds, or using reflective ultraviolet paint on rotor blades for UV-sensitive species, are also quite common [37].
Moreover, there are more direct ways to positively influence citizens' opinions on WPs.In particular, the economic and environmental incentives as well as the climate of trust between citizens, local authorities and investors can play a special role in achieving this objective, and therefore deserves to be considered separately and integrated into a policy for the management of such facilities.When analysing the incentives and conditions required to strengthen the acceptance of WPs, perhaps the existing legislation should also be mentioned [38].
There is no doubt that financial incentives are crucial for the smooth running of a project without much tension on the part of society [39].Similarly, in the case of a wind project, applied financial motivations already exist that can be used to restore the sense of justice for citizens [40,41], such as financial compensation, mainly by reducing or even paying off the power bill, the creation of new jobs, and the possibility of public participation in project investment, as well as contributory projects.The economic easing of costs as well as new jobs are two crucial compensations which can lead to project acceptance, especially at this time, when approximately 9.2% of the world, or 689 million people, live in extreme poverty, according to the World Bank [42].
In addition, the rewards mentioned above constitute projects offered by the manufacturing and holding companies of the WPs and provide direct benefits to local societies.The aim of these projects is to upgrade the residents of the WPs area, quality of life, develop the area itself and, more generally, serve citizens.Such a project is the upgrading of the road network that, beyond the life of the citizens, facilitates the realisation of the project.
Participation in the investment, i.e., through energy communities, is already a tested business model [43].Such a plan offers greater security for the project and intensifies the trust climate between citizens and investors since, in theory, citizens have easier access to the core of the project processes.The literature asserts that the impact or not of a participation plan also depends on demographics and speaks of the exceptional importance of creating equal opportunities for all in participatory projects [44].
It is well known that there is a lack of fairness as not everyone is able to participate in investment, because of the structure of the society we live in [45].However, there are ways to create more equal opportunities for a wider public.Firstly, the introduction of a minimum amount of participation which is feasible for the majority of citizens, and, at the opposite end, a maximum amount, which would prevent the most well-off people from buying a large part of the investment, is one such way.Furthermore, the imposition of a mandatory tender procedure for a substantial part of the investment in public funds could make a positive contribution to this objective.
To conclude, the need to smooth the tensions between society and investors is recognised, but equally understandable should be the fact that we are referring to a two-way relationship.The nature of this relationship shows that to strike a balance between the two, both financial exchanges and retreats are required from investors on issues related to the technical elements and the way the project is developed, implemented and operated, as well as retreats and understanding from citizens on the same issues.

Methodology
The research approach adopted was based on a structured questionnaire aimed at understanding the current opinion of the population on wind projects and ways to mitigate conflicting attitudes towards these installations (Table 2 and Figure 1a,b).The questions were mainly based on the factors that influence a wind project as a whole.The ultimate goal is to prioritise the elements/reasons in terms of their negative impacts, i.e., to what extent they negatively affect the project, as well as find the compensations necessary to smooth the existing differences arising from the above elements/reasons.Existence of three latent variables: positive attitude, negative attitude, attitude towards the investors.

Validity analysis Questions relevant to the problem checked
Accuracy of the questions used, i.e., whether the results/questions really do represent what they are supposed to measure.
High validity (the questionnaire is a result of an extensive literature review, a pilot study to WP experts and a research team brainstorming).The first step in the formulation of the questionnaire (Figures A1-A5) was a literature review, which formed the basis of most of the questions.The initial form of the questionnaire was created using these questions, as well as the brainstorming of the research team and a validity analysis.We then applied exploratory factor analysis in order to identify and classify its possible variables in new (latent) variables/factors.An important element of the questionnaire was (the choice of) the way in which the questions and answers were phrased/measured, aiming to facilitate the analysis of the results.The variables of our interest were qualitative, mainly of ordinal type, and the scale of the responses was chosen to be a Likert one [46], with values ranging from 1 to 5 and interpretations from "not at all" to "extremely".For the questions where the response could not be covered by such a scale, more than three possible values were chosen, among which there was a reasonable gradation (Table A1).
The finalised questionnaire was distributed electronically during March/April 2021.One of the main concerns was to reach areas with wind farms, as well as groups with a negative view towards wind farms and RES in general.An effort was made, therefore, to make the sample chosen as representative, of the target population as possible.As shown in Section 4.2, the questionnaires were: Once IBM SPSS software version 26.0.1.0was selected as the statistical analysis program, the data were recorded and then coded in a way that they could be processed.
The results of the descriptive statistics were given first for the demographic characteristics, while the second part of the analysis was the choice of the proper statistical methods to be used [47][48][49].Three techniques were selected, with the main selection criterion being the ability to process qualitative variables.The first was a computation of frequency distributions and the creation of graphs, the second was a correlation analysis of variables (i.e., x 2 test-crosstabs) and the third one was binary logistic regression.Table 2 provides a detailed explanation of: (i) The methods used in our analysis (ii) The conditions necessary for their application (iii) The necessity of each one of the methods used (iv) The expected results from the methods applied All the requirements for the use of these methods were satisfied by our data, so the respective processes could be applied.

Questionnaire's Validity and Reliability
The initial form of the questionnaire was distributed (randomly) to a number of interviewees, and their answers were recorded.Next to the data collected, we ran an exploratory factor analysis in an attempt to find any latent variable/factors that influence people's thoughts on windmills (and, as a result, organise the questionnaire into different sections of relevance).The application of factor analysis was possible since the basic requirements (Kaiser-Meyer-Olkin Measure of Sampling Adequacy = 0.819 > 0.7, and Bartlett's Test of Sphericity was non-significant) were satisfied.The analysis gave three new factors (Tables A3 and A4), which were: (a) enablers, (b) barriers, and (c) trust in investors, based on the loading scores of each one of the old variables w.r.t. each one of these new factors.This connection can be seen in Figure 2.

Questionnaire's Validity and Reliability
The initial form of the questionnaire was distributed (randomly) to a number of interviewees, and their answers were recorded.Next to the data collected, we ran an exploratory factor analysis in an attempt to find any latent variable/factors that influence people's thoughts on windmills (and, as a result, organise the questionnaire into different sections of relevance).The application of factor analysis was possible since the basic requirements (Kaiser-Meyer-Olkin Measure of Sampling Adequacy = 0.819 > 0.7, and Bartlett's Test of Sphericity was non-significant) were satisfied.The analysis gave three new factors (Tables A3 and A4), which were: (a) enablers, (b) barriers, and (c) trust in investors, based on the loading scores of each one of the old variables w.r.t. each one of these new factors.This connection can be seen in Figure 2.For the conceptual validity of the questionnaire, it was distributed (in addition) to a small group of experts, and their comments were considered.Moreover, for the reliability of the questionnaire (mainly of the newly described factors), inner reliability was applied, and Cronbach's alfa coefficient(s) was determined to be equal to 0.827, 0.639, 0.727 for barriers (negative influence), enablers (positive influence) and trust in investors, respectively.
Considering the alfa values (a questionnaire with an alpha value of around 0.700 is considered to be a reliable one), these 3 factors can be considered and used as scales of positive influence, negative influence, and trust in the investors when someone wants to research (through a questionnaire) the attitude of people (and the factors responsible) versus the establishment and operation of WPs projects.
With the help of the above, the final form of the questionnaire was created and divided into five sections: (1) information about the questionnaire and the purpose of the survey, along with questions about the relationship between the public's awareness of wind farms and RES in general, (2) questions about factors that negatively affect the public's opinion of these projects, (3) a section on the positive effects on the acceptance of wind farms and on the trust in investors , (4) demographic data, and ( 5) a question about climate For the conceptual validity of the questionnaire, it was distributed (in addition) to a small group of experts, and their comments were considered.Moreover, for the reliability of the questionnaire (mainly of the newly described factors), inner reliability was applied, and Cronbach's alfa coefficient(s) was determined to be equal to 0.827, 0.639, 0.727 for barriers (negative influence), enablers (positive influence) and trust in investors, respectively.
Considering the alfa values (a questionnaire with an alpha value of around 0.700 is considered to be a reliable one), these 3 factors can be considered and used as scales of positive influence, negative influence, and trust in the investors when someone wants to research (through a questionnaire) the attitude of people (and the factors responsible) versus the establishment and operation of WPs projects.
With the help of the above, the final form of the questionnaire was created and divided into five sections: (1) information about the questionnaire and the purpose of the survey, along with questions about the relationship between the public's awareness of wind farms and RES in general, (2) questions about factors that negatively affect the public's opinion of these projects, (3) a section on the positive effects on the acceptance of wind farms and on the trust in investors, (4) demographic data, and (5) a question about climate change and an empty space for respondents to share their thoughts.The main part of the questionnaire, i.e., parts 2 and 3, was based on the factors/scales described above.

Data Analysis-Descriptive Statistics
4.3.1.Frequencies 61.1% of the sample members have a positive attitude towards WPs, while 18.3% seem to have a negative opinion about these projects (Figure 3, answers measured on a 5degree Likert scale with 1 being "very negative" through to 5 being "very positive").Moreover, about 60% of the interviewees stated that they were very well informed about RES and only 17% that they were poorly informed, or not informed at all (Figure A6).Τhe responses about the main factors that influence people's opinions on wind projects are impact on flora and fauna (≈70%), landscape alteration (≈55%) and lack of trust towards investors (≈55%) (Figure A7).
In Figure 4, factors are indexed that have a mentionable impact on the mindset of the population towards WPs.It is shown that most of the components play a vital part in the acceptance of the project and in increasing the trust in the investors, with the most important being open and continuous briefing during the project's procedures.Nevertheless, the exploitation of the area as a tourist destination and citizens' participation in investment seem to have the lowest impact on the set of options.The responses about the main factors that influence people's opinions on wind projects are impact on flora and fauna (≈70%), landscape alteration (≈55%) and lack of trust towards investors (≈55%) (Figure A7).
In Figure 4, factors are indexed that have a mentionable impact on the mindset of the population towards WPs.It is shown that most of the components play a vital part in the acceptance of the project and in increasing the trust in the investors, with the most important being open and continuous briefing during the project's procedures.Nevertheless, the exploitation of the area as a tourist destination and citizens' participation in investment seem to have the lowest impact on the set of options.
Furthermore, regarding the question about desired compensation, the power bill discount was the most popular response, with 74% of the sample choosing it, while participation in the project was selected by only 27% of the population (Figure A8).
Finally, the answer to the question about the individual's role in climate change shows that the overwhelming proportion of the sample (81.9%) accepts its responsibility as a part of the problem (Figure A9).This proportion is the result of both the degree of the outbreak and the environmental awareness that has begun to develop evenly in society (not specifically associated with demographic characteristics).Furthermore, regarding the question about desired compensation, the power bill discount was the most popular response, with 74% of the sample choosing it, while participation in the project was selected by only 27% of the population (Figure A8).
Finally, the answer to the question about the individual's role in climate change shows that the overwhelming proportion of the sample (81.9%) accepts its responsibility as a part of the problem (Figure A9).This proportion is the result of both the degree of the outbreak and the environmental awareness that has begun to develop evenly in society (not specifically associated with demographic characteristics).

(Cor.) Relations
Next, in order to find any (possible) relation between demographics and factors which positively/negatively affect attitudes towards WPs, we used the x 2 test of independence (crosstabs) and Phi and Cramer's V coefficients (Figure A10).
(i) Presence of a wind farm First, we examined the (possible) relation between the attitude towards wind projects and the presence or absence of a wind farm in the vicinity of the respondents.From Figure 5, it can be seen that the existence of such a project in the vicinity of the respondents does not affect people's opinion on wind turbines negatively (x 2 = 7.895, p = 0.095).The result is also visually evident from the coincidence of the two lines, with the blue line reflecting the opinion of those who have a WP nearby and the red line the opinion of those who do not.

Gaseous emissions reduction
The use of the area as a tourist destination The lower cost, compared to that of conventual energy production methods The open and continued briefing during the approval, design and operation processes Citizen participation in the investment of the project Investors' efforts to understand people's concerns and thoughts about the project.

(Cor.) Relations
Next, in order to find any (possible) relation between demographics and factors which positively/negatively affect attitudes towards WPs, we used the x 2 test of independence (crosstabs) and Phi and Cramer's V coefficients (Figure A10).
(i) Presence of a wind farm First, we examined the (possible) relation between the attitude towards wind projects and the presence or absence of a wind farm in the vicinity of the respondents.From Figure 5, it can be seen that the existence of such a project in the vicinity of the respondents does not affect people's opinion on wind turbines negatively (x 2 = 7.895, p = 0.095).The result is also visually evident from the coincidence of the two lines, with the blue line reflecting the opinion of those who have a WP nearby and the red line the opinion of those who do not.
It is notable that the distance at which a wind turbine will be placed is not important for those who already have a positive attitude towards WPs.It is notable that the distance at which a wind turbine will be placed is not important for those who already have a positive attitude towards WPs.
(ii) Gender Attitude towards WPs is related to gender (Table A6) (x 2 = 27.769,p < 0.001), with men being more positive about WPs and women more skeptical (about 30% of women responded unenthusiastically)  (ii) Gender Attitude towards WPs is related to gender (Table A6) (x 2 = 27.769,p < 0.001), with men being more positive about WPs and women more skeptical (about 30% of women responded unenthusiastically) (iii) Age Age appears to be inversely proportional to the positive attitude towards WPs (Table A7), apart from the 35-44 age group, which accounts for the largest proportion of negative attitudes (Figure 6).It is notable that the distance at which a wind turbine will be placed is not important for those who already have a positive attitude towards WPs.

(ii) Gender
Attitude towards WPs is related to gender (Table A6) (x 2 = 27.769,p < 0.001), with men being more positive about WPs and women more skeptical (about 30% of women responded unenthusiastically) (iii) Age Age appears to be inversely proportional to the positive attitude towards WPs (Table A7), apart from the 35-44 age group, which accounts for the largest proportion of negative attitudes (Figure 6).Among the factors connected with the creation/operation of WPs and affecting the interviewees in a negative way, the impact on flora and fauna seems to have the greatest influence on young people and noise pollution is the smallest one.Moreover, the lack of confidence in investors mainly affects the 25-54 age group, and the deterioration of the landscape affects all age groups to the same extent (Figure 7).Among the factors connected with the creation/operation of WPs and affecting the interviewees in a negative way, the impact on flora and fauna seems to have the greatest influence on young people and noise pollution is the smallest one.Moreover, the lack of confidence in investors mainly affects the 25-54 age group, and the deterioration of the landscape affects all age groups to the same extent (Figure 7).As for the factors that positively influence attitudes towards wind turbines, the trend diagram (Figure 8) shows that the age group of 18-24 is more cautious towards wind projects while the age group 35-44 is less affected by these factors.Moreover, as age increases, the influence of the following parameters on citizens' opinions towards wind turbines decreases (Figure 8).As for the factors that positively influence attitudes towards wind turbines, the trend diagram (Figure 8) shows that the age group of 18-24 is more cautious towards wind projects while the age group 35-44 is less affected by these factors.Moreover, as age increases, the influence of the following parameters on citizens' opinions towards wind turbines decreases (Figure 8).As for the factors that positively influence attitudes towards wind turbines, the t diagram (Figure 8) shows that the age group of 18-24 is more cautious towards wind jects while the age group 35-44 is less affected by these factors.Moreover, as age incre the influence of the following parameters on citizens' opinions towards wind turb decreases (Figure 8).(iv) Educational level The analysis concluded that the attitude to WPs is not related in a statistically si icant way to educational level (Table A8 and Figure A17) (x 2 = 7.884, p = 0.794), in con to the information (Figure 9) on RES, which seems to be proportional to education 84.742, p < 0.001).(iv) Educational level The analysis concluded that the attitude to WPs is not related in a statistically significant way to educational level (Table A8 and Figure A17) (x 2 = 7.884, p = 0.794), in contrast to the information (Figure 9) on RES, which seems to be proportional to education (x 2 = 84.742,p < 0.001).

(v) Income
Ιncome does not play a (statistically) significant role in people's attitudes towards WPs (Table A9) (x 2 = 18.695, p = 0.768).On the other hand, it is evident from Figure 10 that information on RES increases as income increases (up to a certain income).(v) Income Income does not play a (statistically) significant role in people's attitudes towards WPs (Table A9) (x 2 = 18.695, p = 0.768).On the other hand, it is evident from Figure 10 that information on RES increases as income increases (up to a certain income).

(v) Income
Ιncome does not play a (statistically) significant role in people's attitudes towards WPs (Table A9) (x 2 = 18.695, p = 0.768).On the other hand, it is evident from Figure 10 that information on RES increases as income increases (up to a certain income).

(vi) Region
The x 2 relation analysis also shows that region is not related to the attitude towards WP's (x 2 = 9.947, p = 0.269).More precisely, even though people in Attica are more negatively opposed to such projects (10.6% to 6.1%, respectively, for the Continental Area and the Islands), the majority of the residents in all three areas have a positive or very positive opinion of such projects (60.8%, 57.5% and 64%, respectively).Any percentage differences between regions are proven to be not statistically significant (Figure 11).(vi) Region The x 2 relation analysis also shows that region is not related to the attitude towards WP's (x 2 = 9.947, p = 0.269).More precisely, even though people in Attica are more negatively opposed to such projects (10.6% to 6.1%, respectively, for the Continental Area and the Islands), the majority of the residents in all three areas have a positive or very positive opinion of such projects (60.8%, 57.5% and 64%, respectively).Any percentage differences between regions are proven to be not statistically significant (Figure 11).There are analogous results for region and information on RES.(57.6%, 57.5% and 69.7%, respectively; the difference, once again, is not statistically significant (x 2 = 4.572, p = 0.802), even though people in the islands seem to be more well informed).Moreover, people in all three regions consider that the main factor which influences their opinion is the impact on flora and fauna (37.6%, 39%, 43.6%, respectively) while the most important factor which positively affects their opinion of such a project is the reduction in gaseous emissions (42%, 40% and 44%, respectively).

Logistic Regression
"Attitude against WPs" and the main factors responsible for it were examined.The (independent) factors/variables investigated (as a result/part of the above-mentioned frequency and x 2 analysis) were: There are analogous results for region and information on RES.(57.6%, 57.5% and 69.7%, respectively; the difference, once again, is not statistically significant (x 2 = 4.572, p = 0.802), even though people in the islands seem to be more well informed).Moreover, people in all three regions consider that the main factor which influences their opinion is the impact on flora and fauna (37.6%, 39%, 43.6%, respectively) while the most important factor which positively affects their opinion of such a project is the reduction in gaseous emissions (42%, 40% and 44%, respectively).

Logistic Regression
"Attitude against WPs" and the main factors responsible for it were examined.The (independent) factors/variables investigated (as a result/part of the above-mentioned frequency and x 2 analysis) were: x1, Impacts on flora and fauna The results of the (logistic regression) analysis (Table A12) are described below in a series of tables/graphs (Figure 12, Figure 13 and Table 3).
(    The goodness of fit of the model can also be seen from the following graph (Figure 13): 0′s and 1′s are those who have (a real) negative and positive attitude, respectively, towards WPs.A well-fitted model classifies the ones to the right at 0.5 and the zeros to the left 0.5 (as our model does in the majority of cases).
Table 3 is the main part of the logistic analysis.First, we look at the fourth column, which gives the statistical significance of each one of the seven (independent) variables/factors used in the analysis.Since sig.<0.05, all the variables are (statistically) significant and must be included in the model.Next, the third column gives the coefficients of the logistic equation, which is given by: The meaning and the importance of each one of the variables can be given in coordination with the values of Exp(B) (fifth column).The larger the value of Exp(B), the more significant the factor.
For example, the explanation of the first (coefficient) parameter x1 is: Impacts in flora and fauna: coefficient −0.779 or Exp (−0.779) = 0.459.The possibility (odds) of someone having "positive attitude towards WPs" is 54.1% smaller in case that affects him/her negatively compared to the possibility (odds) of someone being positive towards WPs, in case that affects him/her positively (considering the remainder of the seven factors).
So, the main factors that influence a person's attitude in terms of being positive/negative towards WPs (in order of importance) are x7, x5, x6, x4, x1, x3, x2.
Summarising the above described (frequency and logistic) analysis, it can be seen that there are two categories of reasons affecting a person's attitude towards WPs projects, namely: (I) the environment and (II) the investors.
In fact: (a) the impact on flora and fauna and (b) the lack of trust in the investors influence someone negatively in terms of their acceptance of this kind of project, while, by contrast, (c) the open and continuous briefing during all the stages of construction and operation of WPs and (d) reductions in gaseous emissions influence someone positively.The goodness of fit of the model can also be seen from the following graph (Figure 13): 0 s and 1 s are those who have (a real) negative and positive attitude, respectively, towards WPs.A well-fitted model classifies the ones to the right at 0.5 and the zeros to the left 0.5 (as our model does in the majority of cases).
Table 3 is the main part of the logistic analysis.First, we look at the fourth column, which gives the statistical significance of each one of the seven (independent) variables/factors used in the analysis.Since sig.<0.05, all the variables are (statistically) significant and must be included in the model.Next, the third column gives the coefficients of the logistic equation, which is given by: The meaning and the importance of each one of the variables can be given in coordination with the values of Exp(B) (fifth column).The larger the value of Exp(B), the more significant the factor.
For example, the explanation of the first (coefficient) parameter x1 is: Impacts in flora and fauna: coefficient −0.779 or Exp (−0.779) = 0.459.The possibility (odds) of someone having "positive attitude towards WPs" is 54.1% smaller in case that affects him/her negatively compared to the possibility (odds) of someone being positive towards WPs, in case that affects him/her positively (considering the remainder of the seven factors).
So, the main factors that influence a person's attitude in terms of being positive/negative towards WPs (in order of importance) are x 7 , x 5 , x 6 , x 4 , x 1 , x 3 , x 2 .
Summarising the above described (frequency and logistic) analysis, it can be seen that there are two categories of reasons affecting a person's attitude towards WPs projects, namely: (I) the environment and (II) the investors.
In fact: (a) the impact on flora and fauna and (b) the lack of trust in the investors influence someone negatively in terms of their acceptance of this kind of project, while, by contrast, (c) the open and continuous briefing during all the stages of construction and operation of WPs and (d) reductions in gaseous emissions influence someone positively.

Conclusions and Policy Implications
In this study, conclusions were drawn about the attitudes of the Greek population towards wind energy projects and the factors that influence them.Approximately 80% of the population acknowledges their individual responsibility for the phenomenon of climate change, which explains the overwhelmingly positive attitude towards wind turbines, recognising the need to switch to alternative forms of energy production.However, this attitude seems to be strongly influenced by factors related to project acceptance in general and those that can promote trust towards investors, while in the case of preferential compensation, the most important factor seems to be the discount on electricity costs.
The results show that the presence or absence of wind turbines in the vicinity of the respondents is not significantly related to their attitude towards wind turbines, and the more positive their attitude is, the less they are influenced by the placement of wind turbines in close proximity to their houses.Therefore, it can be concluded that the NIMBY effect has no significant influence on the acceptance of the project.
Moreover, the results of possible relations between the attitude towards WPs and demographic characteristics are of particular importance.In fact, men seem to be better informed about RES than women and, at the same time, more positive towards wind projects, while for age, it is confirmed that younger age groups have a more positive attitude towards projects.The update on RES also shows an analogy between education level and income.Moreover, the acceptance of a WP project does not seem to be a class issue, as the analysis showed that attitude is independent of income class.
Logistic regression was run, resulting in an equation linking/quantifying attitudes towards wind projects to impacts on flora and fauna, landscape alteration, lack of trust in investors, new job positions, reduction in gaseous emissions, the lower cost of energy through windmills compared to conventual energy production methods and open and continuous briefing during the approval, design and operation processes.
The analysis showed that the most important factor in public attitudes towards WPs is open and continuous briefing during the approval, design and operation processes, new job positions and reduction in gaseous emissions.
The above results display the urgent need for increased transparency and information campaigns towards the local society.Also, joint cooperation schemes with local communities, such as energy communities, are a successful global practice.In addition, the Greek local and regional authorities should encourage open discussion on the potential environmental, economic and aesthetic burdens, taking into account environmental responsibility and dynamic energy independence.
The current research had to face limitations such as the fact that wide national coverage of the sample ignored local geographical and morphology characteristics, as well as particular cultures in different Greek regions.The authors recommend, complementary to the above, detailed local research working with the candidate societies combined with technical and visual analysis using the IT tools available.
Finally, as a future study, an additional survey is proposed to collect the opinion of wind turbine investors on the same issues.The objective of the study, namely to examine all dimensions of the problem and mitigate it, is thus achieved.Table A1.Coding of the questionnaire.

Question Code Number
Is there a WP near your area? 1 If not, is your area a possible location for a future WP? 2 What is your perception towards wind projects?3 How informed are you about RES? 4 How much do you think the following factors would influence your opinion about the project?

Land occupation 5a
Impacts on flora and fauna 5b Danger from electromagnetic radiation 5c

Landscape alteration 5d
Luck of trust towards investors 5e

Acoustic nuisances 5f
From what distance and then you would be more receptive to such a project 6 Wind turbine height 50 m 7a ( 1) >100 m 7a (4) Wind turbine power How much can the following enhance or prevent the acceptance of a WP?

New job positions 8a
Reduction in gaseous emissions 8b The exploitation of the area as a tourist destination 8c The lower cost, compared with this of conventual energy production methods 8d Trust towards investors is a determinant for the implementation of the project.According to tour opinion, how important is the role of the following factors in this implementation?
Open and continuous briefing during the approval, design and operation processes 9a Table A1.Cont.

Question Code Number
Citizens' participation in the project's investment 9b The investors' effort to understand your concerns and thoughts about the project.9c The project's acceptance by local authorities 9d Financial compensation may have a direct effect on the public's view of wind projects.What reward do you think is the most fair for you?You can select more than one answers

Power Discount 10a
New job positions 10b

Contributory projects 10c
Participation in the project's investment 10d Gender 11 Age 12

Educational level 13
Occupation 14

Annual income 15
In which regional section do you live? 16 How important do you think the individual's contribution to the climate change problem is? 17
(i) Distributed to Attica, mainland, islands; (ii) Weighted w.r.t.certain factors such as living area and existence or lack of WPs; (iii) Checked w.r.t.sampling adequacy indexes such as KMO.

Figure 2 .
Figure 2. Components grouped by factor analysis.

Figure 2 .
Figure 2. Components grouped by factor analysis.

Figure 4 .
Figure 4. Importance of the factors affecting positively people's attitude towards Wind Parks.

Figure 4 .
Figure 4. Importance of the factors affecting positively people's attitude towards Wind Parks.

Sustainability 2022 , 34 Figure 5 .
Figure 5. Attitude towards WPs vs the infrastructures' existence in the area.

Figure 5 .
Figure 5. Attitude towards WPs vs the infrastructures' existence in the area.

Figure 5 .
Figure 5. Attitude towards WPs vs the infrastructures' existence in the area.

Figure 6 .
Figure 6.Age and attitude towards Wind Parks.

Figure 6 .
Figure 6.Age and attitude towards Wind Parks.

Sustainability 2022 , 34 Figure 7 .
Figure 7. Age and negative impact of factors on Wind Parks.

Figure 7 .
Figure 7. Age and negative impact of factors on Wind Parks.

Figure 7 .
Figure 7. Age and negative impact of factors on Wind Parks.

Figure 8 .
Figure 8. Age and positive impact of factors on Wind Parks.

Figure 8 .
Figure 8. Age and positive impact of factors on Wind Parks.

Figure 9 .
Figure 9. Level of education and the information on renewables.

Figure 9 .
Figure 9. Level of education and the information on renewables.

Figure 9 .
Figure 9. Level of education and the information on renewables.

Figure 10 .
Figure 10.Income in relation to the information on renewables.

Figure 10 .
Figure 10.Income in relation to the information on renewables.

Figure 11 .
Figure 11.Region and attitude towards Wind Parks.
x2, Landscape alteration x3, Lack of trust towards the investors x4, New job positions x5, Reduction in gaseous emissions x6, Lower cost, compared to conventual energy production methods x7, Open and continuous briefing during the approval, design and operation processes recoded as dichotomous variables (new value 0 = negative, old values 1,2,3 on the Likert scale, and new value 1 = positive, old values 4,5 on the Likert scale).

Figure A9 .
Figure A9.Public perception of their responsibility for climate change.

Figure A9 .
Figure A9.Public perception of their responsibility for climate change.

Figure A9 .
Figure A9.Public perception of their responsibility for climate change.
a.The Rotated Component Matrix contains the Pearson correlations between items and components or "factors".These are known as factor loadings and allow us to interpret which traits our components may reflect.

Figure A11 .
Figure A11.People's attitude towards WPs vs land occupation.

Figure A14 .
Figure A14.People's attitude towards WPs vs the distance of the project from their location.

Figure A15 .Figure A15 .
Figure A15.People's attitude towards WPs vs creation of new jobs

Figure A14 .
Figure A14.People's attitude towards WPs vs the distance of the project from their location.

Figure A15 .
Figure A15.People's attitude towards WPs vs creation of new jobs

Table 2 .
Methods used.A detailed explanation.

Table A2 .
Sample distribution vs gender.Information of the population on RES.Factors with negative impact on people's opinion towards WPs.

Table A3 .
Total variance of factor analysis explained.

Table A3 .
Total variance of factor analysis explained.

Table A3 .
Total variance of factor analysis explained.

Table A4 .
Rotated Component Matrix..The Rotated Component Matrix contains the Pearson correlations between items and components or "factors".These are known as factor loadings and allow us to interpret which traits our components may reflect.Reduction in gaseous emissions 706 Lower cost, compared to that of conventual energy production methods 678 Extraction Method: Principal Component Analysis.Rotation Method: Varimax with Kaiser Normalization. a

Table A5 .
x 2 crosstabs of questions/factors and people's attitude towards WPs.

Table A6 .
x 2 crosstabs of questions/factors and gender.

Table A7 .
x 2 crosstabs of questions/factors and age.

Table A8 .
x 2 crosstabs of questions/factors and educational level.

Table A9 .
x 2 crosstabs of questions/factors and income.

Table A10 .
Factors that increase a positive attitude towards WPs.

Table A11 .
Factors that increase trust towards the investors.

Level of influence of the lower cost compared to this of the conventional energy production methods Very negative Negative Mediocre Positive Very positive Figure A16.
People's attitude towards WPs and lower-cost energy through windmills.

Table A12 .
Variables in the Logistic Equation Educational level and people's opinion towards WPs.

Table A12 .
Variables in the Logistic Equation. .Variable(s) entered on step 1 Impacts in flora and fauna, Landscape alteration, Lack of trust towards investors, New job positions, Reduction in gaseous emissions, Lower cost, compared to that of conventual energy production methods, Open and continuous briefing during the approval, design and operation processes. a