Investigating Corporate Environmental Risk Disclosure Using Machine Learning Algorithm

: The volume of the environmental risk disclosure in the annual reports of ﬁrms in the pharmaceutical and chemical, tannery, telecommunications, and paper and printing industries listed on the Dhaka Stock Exchange (DSE) in Bangladesh was analyzed in this paper. The research used a content analysis of the annual reports of 43 companies that represented four DSE sectors. To quantify the level of environmental risk disclosure reporting practiced by corporations in their annual reports, the authors established the ERDIPCI for the pharmaceutical and chemical industry, the ERDITI for the tannery industry, the ERDITeI for the telecommunications industry, and the ERDIPPI for the paper and printing industry. Similarly, the machine learning clustering algorithm, k-means clustering, is used to cluster the companies based on the completion of different environmental indices. It is observed that from four sectors, the highest number of companies from the pharmaceutical and chemical industry disclosed environmental risk disclosures, and the lowest number of companies was from the tannery industry, followed by the telecommunications and the paper and printing industries. The enterprises differ signiﬁcantly in their environmental risk disclosures, and the overall scenarios of the environmental reporting practices by companies in Bangladesh are quite poor. It also shows that among the 43 companies, a limited number of enterprises are placed ﬁrst. The majority of the businesses are in the midst of a cluster that reﬂects the increasing order of indices fulﬁllment. This paper provided a few speciﬁc proposals to the relevant authorities in order to establish a regularity framework in which all the ﬁrms listed on the DSE in Bangladesh will be expected to address environmental risk disclosures and conservation actions in their annual reports towards adaptation to climate change and achieving environmental sustainability.


Introduction
A company's environmental risk disclosure evaluates the status of information included in financial reports in accordance with the addressing, identifying, and processing of the lapse of climate-related risk and opportunities, the climate risk management strategy, the management role, the association of climate-related risk and opportunities with the company's business strategy and financial planning, and the way of mitigating climate-related risk and opportunities [1][2][3]. The natural environment, economic activity, and economic growth and development are all intimately linked, both directly (sources of supplying input materials such as water, timber, and minerals) and indirectly (water purification, environment, projects, pharmaceutical combinations and manufacturing, medicaments, sales, waste management, and the mechanisms of causes with cutting-edge technologies should be integrated into daily human life and industrial operations [20]. If medications are not stored in an environmentally sustainable manner, they can have pharmacological effects on breathing creatures, causing harm to animals and ecosystems [21]. Pharmaceutical and chemical items are not properly disposed of; this will create a dangerous threat to the environment (especially to living organisms, soil fertility, and groundwater) and lead to a negative impact on climate change.

Tannery and Leather Industry
The tannery sector has been considered a significant contributor to Bangladesh's economic development since the beginning of industrialization, including labor orientation in employment [22,23]. Every day, despite the fact that a tannery industrial estate can treat approximately 25,000 cubic meters of liquid waste, it produces 40,000 cubic meters of liquid waste, resulting in the dumping of 15,000 cubic meters of liquid waste into the river without any environmentally friendly treatment, resulting in severe environmental pollution. Furthermore, Bangladesh's tannery industrial estate lacks adequate treatment facilities for solid waste, heavy metals, and chromium, causing serious harm to living organisms, aqua fish, and the environment [24,25]. River water is important for home, agricultural, and industrial purposes, but it is currently at risk of pollution due to metal concentrations, a shortage of soluble oxygen, and the emergence of Cu, Fe, Pb, Cd, Ni, Mn, As, and Cr from the tannery industry and leather manufacturing [26]. Hexavalent chromium, a cancer-causing toxin, can be released from tanneries' dumps, and direct discharge of tannery waste, containing high levels of chromium, cadmium, and arsenic is responsible for serious groundwater pollution, which has a significant impact on fish and shellfish species. Furthermore, unplanned tannery industry development without consideration of environmental impact assessments pollutes the environment [27]. In Bangladesh, wastes from the tannery and leather processing industries are dumped into nearby rivers, lakes, canals, ponds, and drains, severely polluting the environment due to non-operational technology, inadequate drainage systems, a lack of financial input, the exploitative attitude of company owners, and the lack of implementation of proper monitoring. Human problems, such as itching, thoughtlessness, cough, fever, diarrhea, headache, asthma, and dizziness, are also linked to improper tannery waste disposal [28]. This results in an unhealthy environment for humans, animals, livestock, agriculture, and fisheries, among other things [23].

Telecommunications Industry
Telecommunications play an important role in remote sensing, surface water management, natural disaster management, quick communication, online communication, geographic information systems, and natural resource management [29,30]. Telecommunications make our lives easier, but their rapid expansion may have a negative impact on our environment due to the telecommunications infrastructures, mobile phone towers, heavy overhead cables, aerial cabling, hybrid optical fiber/coaxial cable rolls, electromagnetic radiation emissions from mobile phone towers, energy use, greenhouse gas emissions, submarine cables, and other factors [31,32]. Efficient and sustainable uses of energy, telecommunications infrastructure development, mobile phone tower establishment, and efficient management of greenhouse gas emissions and electromagnetic radiation emissions are needed [31]. Telecommunications companies need to disclose their environment-friendly initiatives, environmental conservation activities, and sustainable environment-friendly development activities.

Paper and Printing Industry
Paper is a valuable but wasteful product, which results in paper pollution [33] every year; around 300 million tons of paper is produced worldwide. Copier paper, computer printouts, and notepads are among the most common causes of paper consumption and landfill waste [34]. Furthermore, according to the U.S. Environmental Protection Agency, the United States alone uses 68 million trees for paper production each year. Paper is being used in increasingly diverse ways. In simple terms, we can compare the use of paper to the act of cutting down a tree. The increased usage of paper contributes to the loss of trees. Not only is this an environmental issue, but CO 2 and nitrogen dioxide are regularly released during the paper manufacturing process, and these gases are extremely detrimental to the atmosphere [35]. Furthermore, the paper and printing industries consume a substantial amount of energy and harm the environment. Increased demand for paper leads to additional deforestation, which makes our world unsuitable for our survival [36]. Air pollution, water pollution (by releasing chlorine, iodine, and sulfur dioxide), sound pollution, greenhouse gas emissions, carbon dioxide emissions, aquatic ecosystems, water acidification, and disposal of used paper are all issues that the paper and printing industry faces. It also contributes to global warming and climate change [37]. Due to the expansion of industrialization, urbanization is experiencing challenges due to the lack of clean and affordable water. Water contamination caused by waste from the paper and printing industries has a direct impact on aquatic organisms, plants, human climates, and ecosystems [38].

Industries toward Ecological Balance, Biodiversity, and Sustainability
The extraordinary progress and increase in medication for the treatment of diseases have an impact on the environment. The constant increase in the consumption of human and veterinary pharmaceuticals has an impact on the natural marine environments and ecosystems [39]. The presence of tons of human and veterinary pharmaceutical chemicals on a worldwide scale endangers aquatic and terrestrial ecosystems. Furthermore, medications and chemical compounds are leaking into the soil, groundwater, and wastewater, posing a threat to animals [40]. Pharmaceutical pollutants are threatening the aquatic world and the surface inhabitants because they are not properly quality checked and consumed. Many cytotoxic medications are regularly released from companies and hospitals around the world, and these pharmaceutical pollutants are sent to wastewater treatment plants; however, due to flawed processes, these pharmaceutical contaminants return to the environment [41]. Pharmaceutically active compounds are to blame for harming ecosystems, and pharmaceutically active compounds found in raw and treated wastewater and surface water around the world pose a threat to the environment and human health [42]. Hazaribag, Dhaka, is a pollution hotspot that exacerbates environmental problems not only for the environment but also for the social context due to a lack of proper tannery waste management, the use of outdated technology, the lack of proper waste treatment facilities, and the discharge and dumping of waste [43]. A newly established tannery industrial area in Bangladesh has been identified as the source of two probable sources of heavy metals: the biochemical and leather tanning industries and the geogenic and atmospheric deposition and traffic emissions [44]. The tanning industry found that several chemicals were employed and eventually released into the environment, causing pollution and diseases in the air, soil, and water. Furthermore, chromium, which is produced in tanneries, is extremely detrimental to the environment [45]. The telecommunications industry's power supply, antenna cables, landings, transceivers, routers, base stations, computers, peripheral devices, waste electrical and electronic equipment, water consumption and wastewater, noise emission, and changes in the landscape and habits due to infrastructural developments all have significant negative effects on the environment [31].

Global Concern for Environmental Sustainability
Raising environmental awareness about pharmaceutical-related activities and implementing measures such as green manufacturing, alternative environmentally friendly production processes, efficient operational management, and reducing unused medication led to the enrichment of green principles, as well as to the reduction in chemical and waste use, and ultimately helped to mitigate negative climate change impacts [39]. To prevent the potentially harmful effects on ecosystems and human health, pharmaceutically active chemicals need to be removed through the utilization of modern technology [42]. The current international pharmaceuticals environmental risk assessment (PERA) criteria are not the same in detail, but the entrance paths are identical as the organism and ecological functions inside compartments are highly comparable. The two steps are also included in the environmental risk assessment guidelines for medicines [46]. The phrases "emission into the environment" and "environmental risk assessment" have been used to evaluate the danger of releasing emissions into the environment, as has "information on emission into the environment" [47]. Furthermore, exercising secrecy with regard to environmental risk assessment reports is in violation of Article 4 of the Aarhus Convention, as well as the European and international implementing provisions that require everyone to have unfettered access to environmental information on emissions. In responding to these situations, these studies propose to investigate the corporate environmental risk disclosure and formulate environmental risk disclosure indexes for four industries. Intercontinental frameworks for managing chemicals and wastes have been identified. Their 'Strategic Approach to International Chemicals Management (SAICM)' focused on pharmaceutical contaminants from an environmental standpoint [48]. Nanotechnologies and nanomaterials were also dealt with by the Environmental Persistent Pharmaceuticals Pollutants (EPPP) [49].

For the Tannery Industry (ERDITI)
These include the Environmental Impacts Guidelines for New Source Leather Tanning and Finishing Industries in the USA [50]; the Sector Specific Environmental Impacts Assessment Guidelines for Tannery Projects (Rwanda Environmental Management Authority, 2012) [51]; the Guidelines for Environmental Improvement in Leather and Tannery Sector (Central Pollution Control Board, 2019) [52]; and the Environmental Inspection Guidelines for the Tanning Industry and Basic Principles for Understanding Potential Environmental Threats Caused by the Tanning Industry (European Union Network for Implementation and Enforcement of Environmental Law, 2021/12) [53].

For the Telecommunications Industry ERDITeI
The Best Environmental Management Practice in the Telecommunications ICT Services Sector has been addressed and has been seen as a global initiative and as instructions calling on organizations for more environmental sustainability [31]. Additionally, the International Telecommunication Union (ITU) published "Telecommunication and the Environment: The Path to Sustainable Development" as policy guidelines based on The Rio Declaration and the Agenda 21 Program [54].

For the Paper and Printing Industry ERDIPPI
The Department of Environment and Conservation collaborated with the NSW Environmental Protection Authority in Sydney to produce 'Environmental Actions for the Printing Industry' [55]. Ensuring Environmental Sustainability in the Printing Industry has been initiated and developed by the Swedish University of Agricultural Science [56]. The European Union has adopted around 500 directives and rules under environmental legislation, including those concerning forest protection and chemical limits [57].
Returning now to Bangladesh, only 9.97% of pharmaceutical and chemical companies disclosed very little information in their annual report, and only two companies were identified that disclosed a maximum of 18 environmental factors in their annual report out of 74 factors [58]. On another hand, of 250 fortune global firms, only 35% of the companies disclosed an environmental report, and the other 32% of the companies disclosed other types Sustainability 2022, 14, 10316 6 of 24 of environmental information. In addition, there is a considerable difference of 15-44% with regard to reporting frequencies between financial and nonfinancial factors [59]. In the product design and coefficient manufacturing process, the environmental management systems are perfect and influenced by green chemistry principles, choosing and using correct metrics. In addition, in achieving the sustainability of pharmaceutical companies, waste reduction, mitigation of carbon emissions, and legislative compliance had a positive influence and led to more flexibility and competitive advantage [60]. In a separate section on the website, in the sustainability reports or in the annual reports, companies are disclosing their sustainability activities. Most of the companies focused on energy efficiency, waste management, reducing greenhouse emissions, and health and safety but not on economic sustainability [61]. The telecommunications companies in Bangladesh reported information about social and environmental responsibility within a range of categories. In addition, the education and health sectors of Bangladesh have benefited from the telecommunications industry and are seeking to maintain legitimacy [62].
With the completion of the literature on Bangladesh, the details of the consequences of generating environmental pollutants from several industries towards climate change and global warming, along with the role of environmental reporting regulations for future sustainable existence and development, are shown in Figure 1.
The European Union has adopted around 500 directives and rules under env legislation, including those concerning forest protection and chemical limits [5 Returning now to Bangladesh, only 9.97% of pharmaceutical and chem nies disclosed very little information in their annual report, and only two comp identified that disclosed a maximum of 18 environmental factors in their an out of 74 factors [58]. On another hand, of 250 fortune global firms, only 35% panies disclosed an environmental report, and the other 32% of the companie other types of environmental information. In addition, there is a considerabl of 15-44% with regard to reporting frequencies between financial and nonfinan [59]. In the product design and coefficient manufacturing process, the env management systems are perfect and influenced by green chemistry principle and using correct metrics. In addition, in achieving the sustainability of pha companies, waste reduction, mitigation of carbon emissions, and legislative had a positive influence and led to more flexibility and competitive advantag separate section on the website, in the sustainability reports or in the annual re panies are disclosing their sustainability activities. Most of the companies foc ergy efficiency, waste management, reducing greenhouse emissions, and safety but not on economic sustainability [61]. The telecommunications co Bangladesh reported information about social and environmental responsibil range of categories. In addition, the education and health sectors of Banglades efited from the telecommunications industry and are seeking to maintain legi With the completion of the literature on Bangladesh, the details of the co of generating environmental pollutants from several industries towards clim and global warming, along with the role of environmental reporting regulation sustainable existence and development, are shown in Figure 1. As a coastal state, Bangladesh is in the most vulnerable situation for sus istence and development, and industries are required to account for their su which is required for adaptation to climate change and global warming. The  As a coastal state, Bangladesh is in the most vulnerable situation for sustainable existence and development, and industries are required to account for their sustainability, which is required for adaptation to climate change and global warming. Therefore, this study proposes to evaluate the status of the companies in the pharmaceutical and chemical, tannery, telecommunications, and paper and printing industries listed in the DSE of Bangladesh in the context of the above-mentioned framework.

Materials and Methods
The following is the detailed flowchart of the completion of the entire study shown in Figure 2. study proposes to evaluate the status of the companies in the pharmaceutical and chemical, tannery, telecommunications, and paper and printing industries listed in the DSE of Bangladesh in the context of the above-mentioned framework.

Materials and Methods
The following is the detailed flowchart of the completion of the entire study shown in Figure 2. To complete the study, four industries, namely pharmaceutical and chemical, tannery, telecommunications, and paper and printing, have been selected. On 1st July 2021, there were 32 companies listed as pharmaceutical and chemical industries, 6 companies as tannery industries, 3 companies as telecommunications industries, and 6 companies as paper and printing industries at the DSE. These 43 companies of the four industries were selected from the Dhaka Stock Exchange listing. Of the 43 companies, one is multinational, and 15 companies have a global presence in the exporting sense. The information on all of these companies was collected. Annual reports, sustainability reports, newsletters, and circulars, the company websites, and festivals were deeply evaluated for the collection of the data regarding environmental risk reporting from 2014 to 2020.   To complete the study, four industries, namely pharmaceutical and chemical, tannery, telecommunications, and paper and printing, have been selected. On 1 July 2021, there were 32 companies listed as pharmaceutical and chemical industries, 6 companies as tannery industries, 3 companies as telecommunications industries, and 6 companies as paper and printing industries at the DSE. These 43 companies of the four industries were selected from the Dhaka Stock Exchange listing. Of the 43 companies, one is multinational, and 15 companies have a global presence in the exporting sense. The information on all of these companies was collected. Annual reports, sustainability reports, newsletters, and circulars, the company websites, and festivals were deeply evaluated for the collection of the data regarding environmental risk reporting from 2014 to 2020.

For the Tannery Industry (ERDITI)
The environmental risk disclosure index for the tannery industry was developed by the authors with the understanding of the Environmental Impacts Guidelines for New Source Leather Tanning and Finishing Industries in the USA; the Sector-Specific Environmental Impacts Assessment Guidelines for Tannery Projects; the Guidelines for Environmental Improvement in the Leather and Tannery Sector; the Environmental Inspection Guidelines for the Tanning Industry and Basic Principles for Understanding Potential Environmental Threats Caused by the Tanning Industry; and the United Nations Environment Program (UNEP) [50][51][52][53]67]. These are given in detail in Appendix B. The environmental risk disclosure index for the telecommunications industry was developed by the authors with the understanding of the 'Best Environmental Management Practice (BEMP) in the Telecommunications and ICT Services sector', developed by the European Union, Luxembourg [68]; "Telecommunication and the Environment: The Path to Sustainable Development", guidelines based on The Rio Declaration and the Agenda 21 Program [54]; and the United Nations Environment Program (UNEP) [67]. These are given in detail in Appendix C.

For the Paper and Printing Industry (ERDIPPI)
The environmental risk disclosure index for the telecommunications industry was developed by the authors with the understanding of 'The State of the Global Paper Industry (SGPI) [69]; the 'Environmental Action for the Printing Industry (EAPI)' [70]; the United Nations Environment Program (UNEP) [67]; and the Environmental, Health, and Safety Guidelines Telecommunications [71]. These are given in detail in Appendix D.
To analyze the data of the four different industries, the following procedure is used. We mainly investigate the environmental disclosure index of the different companies under the different industries. A total of three types of analysis are performed in this analysis.
In analysis 1, the addition of the different indexes is mainly calculated for each company every year, using Formula (1) and visualized in Figures 3-6.      In analysis 2, the performance of different industries according to year is investi- In analysis 2, the performance of different industries according to year is investigated. For each industry, all the responsible companies are added, and the addition of the different environmental disclosure indexes is calculated column-wise by Formula (2) and visualized in Figure 7.     In analysis 3, the tendency of the highest performing index is calculated using formula 3, where the sum of every environmental disclosure index for all of the companies under the different industries is calculated and visualized in Figure 8.  In analysis 3, the tendency of the highest performing index is calculated using Formula (3), where the sum of every environmental disclosure index for all of the companies under the different industries is calculated and visualized in Figure 8. K-Means Clustering: K-means clustering is an unsupervised machine learning algorithm that is used to categorize the unlabeled data. The target of using this algorithm is to make a group of the data based on the characteristics of the data, where the number of groups is represented by k. K is defined by the elbow method.
Elbow Method: The elbow technique runs k-means clustering on the dataset for a range of k values (say, 1-10) and then computes an average score for all the clusters for each value of k. The distortion score, which is the sum of the square distances from each point to its assigned center, is computed by default.
A cluster is a collection of data points that have been grouped together due to particular similarities. You set a target number, k, for the number of centroids required in the dataset. A centroid is a fictional or real location that represents the cluster's center. By lowering the in-cluster sum of squares, each data point is assigned to one of the clusters. To put it another way, the k-means algorithm finds k centroids and then assigns each data point to the closest cluster while keeping the centroids as small as possible. The average of the data, or the determining of the centroid, is what the 'means' in k-means refers to.
The k-means technique in data mining starts with the first group of randomly picked centroids, which serve as the starting points for each cluster, and then performs iterative (repetitive) calculations to optimize the centroids' placements.
K-means clustering is easy to implement, and it can handle large quantity of data. We can choose to cluster manually, and this algorithm can easily be adopted with the new data. These characteristics of this algorithm motivate us to use it in this study instead of hierarchical clustering models.
K-means clustering uses the Euclidean distance between two points to complete the analysis and make clusters. The equation is p2) and q = (q1, q2), then the distance is given. K-Means Clustering: K-means clustering is an unsupervised machine learning algorithm that is used to categorize the unlabeled data. The target of using this algorithm is to make a group of the data based on the characteristics of the data, where the number of groups is represented by k. K is defined by the elbow method.
Elbow Method: The elbow technique runs k-means clustering on the dataset for a range of k values (say, 1-10) and then computes an average score for all the clusters for each value of k. The distortion score, which is the sum of the square distances from each point to its assigned center, is computed by default.
A cluster is a collection of data points that have been grouped together due to particular similarities. You set a target number, k, for the number of centroids required in the dataset. A centroid is a fictional or real location that represents the cluster's center. By lowering the in-cluster sum of squares, each data point is assigned to one of the clusters. To put it another way, the k-means algorithm finds k centroids and then assigns each data point to the closest cluster while keeping the centroids as small as possible. The average of the data, or the determining of the centroid, is what the 'means' in k-means refers to.
The k-means technique in data mining starts with the first group of randomly picked centroids, which serve as the starting points for each cluster, and then performs iterative (repetitive) calculations to optimize the centroids' placements.
K-means clustering is easy to implement, and it can handle large quantity of data. We can choose to cluster manually, and this algorithm can easily be adopted with the new data. These characteristics of this algorithm motivate us to use it in this study instead of hierarchical clustering models. K-means clustering uses the Euclidean distance between two points to complete the analysis and make clusters. The equation is If p = (p 1 , p 2 ) and q = (q 1 , q 2 ), then the distance is given. This algorithm works on the datapoint of the EDRI for different companies under different industries. By calculating the distance, this algorithm can find the internal relationship among the companies and assign labels to the companies and finally make a cluster.

Results and Discussion
The total analysis is conducted based on Equations (1)-(3) above. Mainly, the formula is generated based on the theoretical concept of this research. The results are visualized using different curves according to years, industries, and the environmental disclosure index.
The performances of the different industries are represented from 2014 to 2020 in Figure 3a-d. The performance of the companies towards environmental reporting from the pharmaceutical and chemical industry shows that the performance of the companies in this industry is improving in the index day by day. The improvement in 2015-2016 is less than in 2014-2015, but after 2016, the performance is increasing year by year, and in 2019-2020, the change is remarkable. Most companies improvise their index to archive the goal. The performance of the tannery industry is not at a satisfactory level from 2014 to 2020. Most companies are not aware of increasing the environmental reporting disclosure index. AFL is trying to improve; on the other hand, LFL is still neutral and has no improvement in this time period. Most of the environmental pollution is directly or indirectly related to this industry. Necessary steps should be taken to improve the performance of those companies. The performance of the telecommunications industry is also not satisfactory. Figure 3c indicates that BSCCL is still having no progress in increasing or taking any action to complete the environmental disclosure index. GL and RAL are trying, but the improvement is not at a satisfactory level. From 2014 to 2017, the performance of the paper and printing industry is too low. After this time period, the companies start to complete the environmental disclosure index. From 2017 to 2018, HPPML showed a remarkable change, but after that time, it goes down. In 2019-2020, it shows its maximum.
The performances of the industries according to year are shown in Figure 4. From 2014 to 2020, a bar chart is generated by calculating the values using formula 2. The performance of every industry is increased by changing the years. Figure 5 represents the tendency of the highest performing index item of the different industries. Most of the companies are positive on the indexes 9, 10, 17, 18, 25, and 26. In this case, the performance of the pharmaceutical and chemical industry is better than the others.

Clustering of the Company According to Fulfillment of the Index
In this section, we use one of the most-used unsupervised machine learning algorithms, namely k-means clustering. Using the elbow method, we obtain a suggestion that recommends clustering the data into three different classes. The value of k in three, recommended by the elbow method, is represented in Figure 7.
Using k = 3 in k-means clustering, we obtain three subsets. We named the categories as follows. Category 1 (C1) is a company that completes more than 19 indexes; in this category, we find 6 companies of different industries. Category 2 (C2) is a company that completes less than 19 indexes but above 7 indexes; most of the companies are in this category, and the number is 20. Category 3 (C3) is a company that completes less than 7 indexes; 19 companies are listed in this group.

Implication of the Study
The acceptance and performance of a business organization are now being judged not only on its financial results but also with respect to its contribution to protecting and conserving the environment. Due to climate change, Bangladeshi companies need to include mandatory environmental risk disclosures in their annual reports. Here, the government of Bangladesh, or more specifically the ministry of finance, the DSE, the ministry of climate change, or the national board of revenue, can play a vital role in the preparation of environmental risk disclosure guidelines in Bangladesh. Environmental issues have become an important variable in the operations of the business. As a result, the accounting of environmental issues, their disclosure in the environmental issues, and their disclosure in the annual reports or by companies have become an important part of corporate accounting and reporting systems nowadays. Now all companies are disclosing environmental risk issues in annual reports voluntarily.
Bangladesh is a wetland and a coastal state with a high vulnerability to climate change, global warming, and sea-level rise. Environmental degradation has a direct impact on human health and leads to high healthcare costs. It seems that the countries with high pollution and environmental degradation have to face severe health complexities and bear a high financial burden in terms of health costs [72]. Bangladesh, with regard to adverse climate change, has observed frequent cyclones hit coastal communities and faced socioeconomic crisis and poverty with high treatment costs. In comparison with other parts, the coastal parts of Bangladesh, namely Gabura, Munshigong, Atulia, Burigoaliny, and Padmapukur, are in a worsening situation with respect to drinking water scarcity, salinity hazards, and health hazards due to climate change and sea-level rise [73]. In the long run, CO 2 emissions have a positive impact on health expenditure [74]. In both public and national healthcare expenditure, CO 2 emissions, environmental pollution, and degradation exert statistically significant impacts [75,76]. The healthcare cost is relatively high in the areas where the pollution from the tannery, telecommunications, paper and printing, and pharmaceutical and chemical industries is high.
The findings of the study will give the true way of adapting measures of environmental risk disclosure practices for the companies towards climate change for sustainable futures and development in the following ways: 1.
The government of Bangladesh declared the plantation of 1 million palmyra palm trees across Bangladesh to avert deaths occurring from common natural disasters, such as cyclones, lightning, and thunderstorms. In this regard, the government can engage pharmaceutical and chemical companies to achieve the target of planting 1 million palmyra palm trees.

2.
The introduction of the high standards of a pollution-free environment for all the companies operating in Bangladesh, with strict monitoring and ensuring that the companies do not have any activities which are harmful to the environment and nature is needed. The Bangladesh Securities Exchange Commission, Dhaka Stock Exchange, Chittagong Stock Exchange, or other authoritative bodies need to establish a framework consisting of mandatory environmental reporting.

3.
The all-inclusive waste management needs to be handled with the best available technologies (BAT), which will include an incineration plant, dust control units, and scrubbers to ensure zero discharge of solid waste that may harm the surrounding ecological system and lead to ecological imbalance.

4.
Ensuring the selection of environment-friendly technology and compliance with the environmental codes.

5.
Establishing guidelines to implement proper occupational health, industrial hygiene, and effluent management system in its manufacturing site. 6.
Establishing a zero-tolerance policy in order to maintain the appropriate environment and pollution-free environment and to ensure that is environment-friendly, not destructive.

7.
It is necessary to create a corporate culture in which safety to the environment is always the top priority and is an integral part. 8.
Establishing a system of reviewing environment and safety performance on a monthly, quarterly, semiannual, and annual basis because the environmental risk is always a key focus of standardized environmental processes. 9.
Rainwater harvesting should be given priority to meet the ever-increasing demand for water resources. 10. Tax holidays and tax incentive schemes need to be given to the company to achieve a specific line of action with regard to environmental conservation and environmental reporting. Community engagement in the light of waste management and waste disposal needs to be ensured on a targeted basis. 11. Establishing such a legal structure in which it will be stated that failure to ensure the eco-friendly use of machines and materials will lead to the cancelation of the legal license to operate the business in Bangladesh. 12. Initiating the establishment of the concept of the green factory and assigning the timeframe for the companies for achieving the green certificate from the authority or otherwise receive punishment for nonconformance. 13. Celebrating nationwide green exhibitions by the companies with their environmental conservatism initiatives, as well ranking the companies on the basis of their green performance in the industry, year to year, company to company, and by global standards. 14. E-waste recycling management tools need to be adopted by the telecommunications companies, and providers need to be added which provide green services to customers.

Conclusions
The environment is changing very fast and affecting the earth unfavorably with its consequences which intensify the manifestation of diseases, population migration risk, sea-level rise, drinking water scarcity, flooding, riverbank erosion, coastal disasters, and finally an unhealthy environment for humans, animals, livestock, crops, and fisheries. In some cases, with rising national health expenditures, environmental pollution is said to be the key determinant. In the long run, environmental degradation has a direct and indirect impact on human health, leading to the bearing of a high financial burden for health issues in healthcare costs. It is even high in the country where the pollution is relatively high. In personal, public, and national healthcare policies, environmental impacts now need to be meticulous. As responsible business entities, companies need to be highly focused on the continuous deployment of enhanced sustainable solutions for energy-efficient and environment-friendly networks. The company's first priority needs to be to reduce the CO 2 emissions generated by improving system efficiency and reducing overall energy consumption. The company's aims should optimize energy consumption by reducing the dependency on diesel generators and increasing the use of solar energy and reducing operational travel time. Economic benefits without environmental conservation hold no appeal. All that we need for our existence and security depends, either directly or indirectly, on our usual environment. This means being better stewards of our environment and our resources. A suitable environment, a sustainable environment, and an ecological balance are very essential for a healthy society and nationalized development. Several recent studies revealed that the number of deaths caused by common natural disasters, such as cyclones, lightning, and thunderstorms, in Bangladesh has increased as an ecological imbalance. The wastes generated from industrial operations have a degrading effect on the environment and ecological system. Such deaths and natural disasters may be prevented to a significant extent if the environment is protected from pollution. Here, companies can play a strong role in initiating, adapting, and implementing environmental conservatism, sustainability reporting, and environmental risk disclosure practices. As a coastal state, the developing economy's adaptive measures taken by Bangladesh are so challenging. Environmental risk reporting disclosure practices by the companies in the pharmaceutical and chemical, tannery, telecommunications, and paper and printing industries are not at a satisfactory level.
Organizations are now not only judged on the basis of financial performance but also on the reporting which has been used to inform stakeholders about the organization's position in relation to economic aspects, environmental practices, labor practices and decent work, social human rights, society, and product responsibility. As an answerable part of the society, organizations are required to pursue environmental and social initiatives and to integrate these considerations into the product design, strategic planning, and policies and finally in the reporting which could a play role in reducing climate risk. Using the study findings as a tool for the reporting of the company's environmental issues, it will be able to focus on extending its positive arch of influences across the stakeholders and aim to mitigate climate risk, ensure a sustainable future existence, and a create strong loyal customer base.
This study only contains 4 sectors out of the 22 sectors of DSE. In future studies, it can be extended to other sectors also. We analyzed the annual reports from 2014 to 2020, but they can be extended with more years. We used k-means clustering and the elbow method as a machine learning algorithm; in the future, researchers can contribute by using other machine learning algorithms and tools.  Data Availability Statement: Data are available upon special request from the corresponding author.

Conflicts of Interest:
The authors declare no conflict of interest.

Development of Environmental Risk Disclosure Index for Pharmaceutical and Chemical Industry (ERDIPCI):
Coding Items

ERDIPCI1
Total energy consumption and initiatives to reduce it.

ERDIPCI2
Total materials used and initiatives to reduce them.

ERDIPCI3
Water withdrawal and initiatives to reduce it.

ERDIPCI4
Greenhouse gas emissions and initiatives to reduce them.

ERDIPCI5
Total water discharge and initiatives to reduce it.

ERDIPCI6
Effluents, air, and nuisance and initiatives to reduce them.

ERDIPCI7
Release and transfer of chemical substances and initiatives to reduce them.

ERDIPCI8
Total weight of waste generated, waste disposed by land filling or incineration and initiatives to reduce them.

ERDIPCI9
New environmental technologies and research and development.

ERDIPCI10
Products and services designed for mitigating environmental impacts.

ERDIPCI11
Conservation of biological diversity and the sustainable use of its components.

ERDIPCI12
Ensuring biomedical waste management.

ERDIPCI13
Proper chemical waste management.

ERDIPCI14
Proper disposal manual of medical supplies.

ERDIPCI15
Ensure clean production and protecting the environment.

ERDIPCI16
Dependency on renewal energy (using alternative source).

ERDIPCI17
Handling and disposing of hazardous materials.

ERDIPCI18
Ensure social responsibility and social awareness.

ERDIPCI21
Investment and cost for environmental conservation.

ERDIPCI22
Environmental guidelines and environmental plan.

ERDIPCI23
Environmental education and environmental enlightenment activities.

ERDIPCI24
Environmental laws and regulations and lawsuits.

ERDIPCI25
Contribution to society with regard to the environment.

ERDIPCI26
Sustainable manufacturing practices and statement of compliance.

Development of Environmental Risk Disclosure Index for Tannery Industry (ERDITI):
Coding Items

ERDITI1
Total energy consumption and initiatives to reduce it.

ERDITI2
Total materials used and initiatives to reduce them.

ERDITI3
Water withdrawal and initiatives to reduce it.

ERDITI4
Greenhouse gas emissions and initiatives to reduce them.

ERDITI5
Total water discharge and initiatives to reduce it.

ERDITI6
Effluents and nuisance and initiatives to reduce them.

ERDITI7
Release and transfer of chemical substances and initiatives to reduce them.

ERDITI8
Total weight of waste generated, waste disposed by land filling or incineration and initiatives to reduce them.

ERDITI9
New environmental technologies and research and development.

ERDITI10
Products and services designed for mitigating environmental impacts.

ERDITI11
Conservation of biological diversity and the sustainable use of its components.

ERDITI12
Automated water and organic compacted system ERDITI13 Proper chemical waste management.

ERDITI14
Proper disposal manual of medical supplies.

ERDITI15
Ensure clean production.

ERDITI16
Dependency on renewal energy (using alternative source).

ERDITI17
Handling and disposing of hazardous materials.

ERDITI18
Ensure social responsibility.

ERDITI21
Investment and cost for environmental conservation.

ERDITI22
Environmental guidelines and environmental plan.

ERDITI23
Environmental education and environmental enlightenment activities.

ERDITI24
Environmental laws and regulations and lawsuits.

ERDITI25
Contribution to society with regard to the environment.

Appendix C
Development of Environmental Risk Disclosure Index for Telecommunications Industry (ERDITeI):

ERDITeI1
Total energy consumption and initiatives to reduce it.

ERDITeI2
Total materials used and initiatives to reduce them.

ERDITeI3
Water withdrawal and initiatives to reduce it.

ERDITeI4
Greenhouse gas emissions and initiatives to reduce them.

ERDITeI5
Total water discharge and initiatives to reduce it.

ERDITeI6
Effluents and nuisance and initiatives to reduce them.

ERDITeI7
Release and transfer of chemical substances and initiatives to reduce them.

ERDITeI8
Total weight of waste generated, waste disposed by land filling or incineration and initiatives to reduce them and E-Waste management.

ERDITeI9
New environmental technologies and research and development.

ERDITeI10
Products and services designed for mitigating environmental impacts and systems.

ERDITeI11
Conservation of biological diversity and the sustainable use of its components.

ERDITeI14
Dependency on renewal energy (using alternative source).

ERDITeI18
Investment for environmental conservation and adoption of green practices.

ERDITeI19
Environmental guidelines, environmental plan, and environmental management systems.

ERDITeI20
Environmental education and environmental enlightenment activities.

ERDITeI21
Environmental laws and regulations and lawsuits.

ERDITeI22
Contribution to society with regard to the environment.

Development of Environmental Risk Disclosure Index for Paper and Printing Industry (ERDIPPI):
Coding Items

ERDIPPI1
Total energy consumption and initiatives to reduce it.

ERDIPPI2
Total materials used and initiatives to reduce them.

ERDIPPI3
Water withdrawal and initiatives to reduce it.

ERDIPPI4
Greenhouse gas emissions and initiatives to reduce them.

ERDIPPI5
Total water discharge and initiatives to reduce it.

ERDIPPI6
Effluents and nuisance, and initiatives to reduce them.

ERDIPPI7
Release and transfer of chemical substances and initiatives to reduce them.

ERDIPPI8
Total weight of waste generated, waste disposed by land filling or incineration and initiatives to reduce them.

ERDIPPI9
New environmental technologies, research and development, and processes.

ERDIPPI10
Products and services designed for mitigating environmental impacts.

ERDIPPI11
Conservation of biological diversity and the sustainable use of its components.

ERDIPPI12
Ensuring proper waste management (reuse, recycling and disposal of inks, paper, plates and pallets).

ERDIPPI14
Dependency on renewal energy (using alternative source).

ERDIPPI15
Handling and disposing of hazardous materials.

ERDIPPI16
Maximize the recycled fibre content.

ERDIPPI17
Suitability for recycled/certified paper grades.

ERDIPPI19
Paper waste in production (inventory and initiative).

ERDIPPI20
Ensure social responsibility and caring environment.

ERDIPPI23
Investment and cost for environmental conservation.

ERDIPPI24
Environmental guidelines and environmental plan.

ERDIPPI25
Environmental education and environmental enlightenment activities.

ERDIPPI26
Environmental laws and regulations and lawsuits.

ERDIPPI27
Contribution to society with regard to the environment.

ERDIPPI28
Complying with the rules.