Search Results (717)

Inter-provincial administrative boundary areas are particularly vulnerable to ineffective regional pollution governance because they are simultaneously affected by transboundary pollution diffusion and administrative fragmentation. Existing governance practices, however, continue to rely heavily on territorially based regulation and administrative coordination, while the potential of cross-regional green-technology collaboration to address boundary pollution has received insufficient attention. Using panel data for Chinese prefecture-level cities from 2011 to 2023, this study systematically examines the impact of green innovation collaboration (GIC) on pollution control in areas along interprovincial administrative boundaries through two-way fixed-effects, instrumental-variable, Heckman two-step, and spatial Durbin models. The results show that, first, GIC significantly reduces pollution in these areas, and this finding remains robust across a range of robustness checks. GIC also generates significant spatial spillovers: while reducing local boundary pollution, it improves air quality in neighboring cities. Second, the heterogeneity analysis indicates that this effect is more pronounced in cities facing greater pollution-control pressure, lower fiscal pressure, and higher levels of openness. The regional results also reveal certain differences. Third, the mechanism analysis shows that cross-regional collaborative governance and industrial upgrading constitute two relatively independent parallel transmission pathways rather than a sequential chain, and their relative contributions vary with city conditions. These findings provide empirical evidence for improving interprovincial collaborative governance, facilitating the cross-regional diffusion of green technologies, and implementing differentiated environmental policies. Full article

Using panel data on Chinese A-share listed firms from 2002 to 2024, this study examines the impact of the Air Pollution Prevention and Control Action Plan (the Air Ten policy) on firms’ cross-regional investment. We identify the policy effect using a multi-period difference-in-differences (DID) model with firm and year fixed effects. The findings remain robust across a series of tests, including the parallel trend test, propensity score matching combined with DID (PSM-DID), placebo tests, alternative variable specifications, additional control variables, and high-dimensional fixed effects. The results show that the Air Ten policy significantly promotes firms’ cross-regional investment. Mechanism analyses suggest three potential channels through which the policy operates: enhancing firms’ green innovation capability, improving human capital quality, and facilitating regional industrial upgrading. The resulting industrial upgrading creates a more favorable external environment for firms to expand their investment activities. Heterogeneity analyses show that the positive effect is more pronounced among firms with higher R&D intensity, weaker internal control, and those located in eastern China. We find no evidence that the policy-induced cross-regional investment is driven by pollution relocation. Instead, the results suggest that firms’ cross-regional expansion is more likely to reflect a capability-driven mechanism than regulatory arbitrage. This finding is broadly consistent with the pollution halo perspective and provides further support for the Porter hypothesis. Overall, this study offers new insights into how environmental regulation reshapes corporate capital allocation and geographic expansion strategies. Full article

Urban parks provide recreation, cultural ecosystem services, microclimate regulation, and benefits for well-being, but their realized value may vary with air pollution and heat. This exploratory study linked 2947 Google Maps reviews posted in 2024–2025 to daily PM2.5, temperature, humidity, and precipitation and assessed a BERT-based workflow for classifying star-linked sentiment and dominant emotion text labels. Star-linked sentiment classifications were highly favorable (mean score of 4.86/5; 88.39% very positive). Independent weighting of the rounded air-quality and heat-stress subgroup summaries yielded consistent approximate overall shares for provisional joy (28.9%) and anger (32.5%), but the full seven-class distribution could not be reconstructed from the archive. All emotion-label analyses remain provisional. All 25 tested environmental correlations were negligible (absolute Spearman ρ ≤ 0.049), and none met the Bonferroni-corrected significance threshold (α = 0.002). Posting dates classified as heat-stress days showed descriptive differences in provisional anger and joy labels, but posting date is an uncertain proxy for the visit date. The findings do not establish individual-level exposure associations. They instead illustrate the methodological safeguards needed before user-generated park feedback and environmental monitoring can support climate-responsive management. Full article

Micro-sprinkler irrigation is commonly used to optimize plant growing environments and prevent growth inhibition and yield losses caused by high air temperatures (T_a) in greenhouses. Nevertheless, instantaneous photosynthetic rate measurements suffer from time lag, and the temporally dynamic microclimate alterations induced by micro-sprinkling make it difficult to reproduce the real ambient conditions for crop growth. Therefore, two treatments, namely micro-sprinkling combined with drip irrigation (MSDI) and conventional drip irrigation control (DI), were established in a Venlo-type greenhouse. Continuous chlorophyll fluorescence (ChlF) monitoring combined with rapid light curves under fixed photosynthetically active radiation was adopted to investigate the diurnal alleviation effects of micro-sprinkling on tomatoes under high-temperature stress. This study found that Φ_PSII was more sensitive than Fv/Fm in detecting changes in PSII photochemical performance under high-temperature stress. Micro-sprinkling showed greater mitigation effects under moderate heat stress, with the highest enhancement in Φ_PSII (approximately 0.12) observed when leaf temperature (T_l) was around 34.5 °C. However, the improvement effect decreased under extreme heat conditions, and Φ_PSII increased by only 0.017 when T_a exceeded 38 °C. The slope of the fitted line between Φ_PSII and PAR on sunny days increased with increasing heat stress, indicating the enhanced sensitivity of PSII photochemical regulation to thermal stress. Compared with DI, MSDI increased tomato yield by 31.2% and 47.6% in 2021 and 2022, respectively, while improving fruit quality by increasing single fruit weight, fruit shape index, and soluble sugar content. In addition, MSDI increased SPAD, Fv/Fm, Φ_PSII, and ETR by 9.6–15.6%, 8.8–14.8%, 10.3–13.3%, and 10.3–19.6%, respectively, indicating improved PSII photochemical performance under high-temperature conditions. In conclusion, micro-sprinkling mitigated part of the negative effects of high-temperature stress and significantly improved tomato yields and fruit quality, which could be used in agricultural production. Full article

India has one of the highest public health burdens attributable to air pollution globally. Despite national air quality regulations and control policies, improvements in air quality have been limited, restricting opportunities to evaluate the health benefits of cleaner air under real-world conditions. COVID-19 lockdowns substantially reduced air pollution in India’s megacities, creating a natural experiment for assessing pollution-attributable health benefits. Using ambient PM_2.5 concentration data from United States Embassy and Consulate monitors in Chennai, Hyderabad, Kolkata, Mumbai, and New Delhi during the 2020 and 2021 lockdowns, and World Health Organization AirQ+ software, we estimated the short- and long-term health benefits of maintaining lockdown-related improvements in air quality. PM_2.5 reductions ranging from 28–77% during the first lockdown, if sustained long term, would lead to about 42,778 fewer premature deaths in the short term and 132,000 fewer annual avoidable deaths from all causes under the modeled scenario across the five cities. We also estimated annual reductions of 11,100 deaths from chronic obstructive pulmonary disease, 3900 from lung cancer, 5500 from ischaemic heart disease, 3900 from stroke, and 1240 from acute lower respiratory infection. These findings support stronger air quality standards, emission controls, and policy enforcement to reduce air pollution-related mortality in Indian megacities. Full article

Here, changes in sustainability are assessed using statistical data for all countries between 1990 and 2015, with a focus on the fifteen most populous countries. The indicators used cover GDP for the economy; poverty, education, and health for human capabilities; as well as environmental impacts on water, climate, air, and bioresources. An authoritative model is used to describe the environmental impacts, resulting from pressures driven by population and affluence; and responses, through decreasing resource intensity, measured by the resource use per GDP, and improving environmental efficiency, defined as emissions per resource use. Resource intensity decreases in most countries. Environmental efficiency improves for wastewater and NOx, hardly changes for CO₂, and increases in nature protection areas, but this rarely compensates for deforestation. The combination of pressures and responses reduced water pollution and air pollution, and mitigated climate change in high-income countries, but did not reduce the degradation of biodiversity. While the pressures, responses, and environmental impacts of economic growth vary across all countries, twenty-five growing economies have reduced those environmental impacts. Changes toward sustainability are discussed with regard to the growing share of services in economies in the ‘EKC hypothesis’, innovation for achieving higher value at lower impact in the ‘green growth’ idea, and regulations that lead to profitable environmental investments in the ‘Porter hypothesis’. Combined, they only partially explain the changes because they ignore the low prices of natural resources and high shareholder consumption. Additionally, regulations are needed that increase the price of environmental impacts relative to the price of man-made resources and enforce high-quality performance standards. Full article

Anthropogenic air pollution represents a significant threat to both environmental and human health, with nitrogen oxides (NO_x) playing a substantial role in the formation of photochemical smog, acid rain, eutrophication, and respiratory diseases. In Bangladesh, NO_x emissions primarily originate from combustion sources such as road transportation, power generation, and industrial activities, while natural sources include lightning, wildfires, and soil emissions. Furthermore, ammonia emissions from fertilizers and livestock exacerbate air quality issues in both urban and rural settings. Despite the acknowledgment of vehicular and industrial contributions, comprehensive and systematic assessments of NO₂ trends across the nation remain scarce. This study presents a complementary, side-by-side assessment of ground-based NO₂ measurements from the Department of Environment (DoE) with atmospheric NO₂ retrieved from the Sentinel-5P TROPOMI Level-3 product via Google Earth Engine (GEE). Spatial distribution patterns of both ground-level and atmospheric NO₂ were analyzed using ArcGIS Pro, along with seasonal and interannual trend assessments from 2018 to 2024. Results indicated pronounced spatial and temporal variability in NO₂ concentrations. The highest levels were consistently recorded over Dhaka and surrounding industrial zones, with moderate accumulation in Chattogram. Winter months (December–February) exhibited hazardous concentrations, with a national maximum of 205.21 µg/m³, while monsoon periods recorded the lowest levels overall, as reflected in its seasonal mean (see below). Seasonal averages indicated the highest concentrations in winter (35.03 µg/m³), followed by pre-monsoon (29.16 µg/m³), with monsoon recording the lowest seasonal mean (19.94 µg/m³). Long-term analysis showed the highest national annual mean NO₂ con-centration in 2018 (44.32 µg/m³), decreasing to 14.81 µg/m³ by 2024, with non-monotonic year-to-year fluctuation in the intervening period (2020–2021 data were unavailable). These findings underscore the necessity for stricter emission regulations and targeted mitigation measures. As a policy recommendation, this may include the implementation of NO_x-selective catalytic reduction (SCR) using NH₃ over metal oxide and zeolite catalysts. This study provides evidence-based insights to support cleaner air initiatives and sustainable environmental management strategies in Bangladesh. Full article

Rapid urban growth and industrial activity have significantly increased air pollution in Chattogram, Bangladesh. Among various pollutants, particulate matter (PM_2.5 and PM₁₀) has emerged as a major concern due to its severe effects on public health and the environment. This study investigates seasonal and temporal variations in air quality and identifies periods of high risk. Data were collected from the Department of Environment, including PM_2.5 and PM₁₀ measurements from 2013 to April 2025 and AQI data from 2022 to April 2025. The analysis focuses on seasonal trends, monthly fluctuations, extreme pollution events, and correlations among pollutants. The study examines which seasons are most polluted and how PM_2.5, PM₁₀, and AQI change over the year. Results indicate that winter experiences the highest pollution levels, while monsoon shows the lowest. Pre-monsoon and post-monsoon show moderate pollution, representing transitional periods with variable air quality. Monthly trends reveal that pollution peaks in January and reaches its lowest point in July, demonstrating clear temporal patterns. Extreme pollution events are most frequent in winter and the pre-monsoon period, emphasizing periods of highest health risk. Correlation analysis shows strong positive associations between PM_2.5, PM₁₀, and AQI (r > 0.80). Machine-learning models demonstrated moderate predictive skill for PM₁₀ forecasting (R² up to 0.65), while PM_2.5 models at Agrabad produced negative R² values, indicating performance worse than a mean-value benchmark; accordingly, long-term PM_2.5 projections at Agrabad are not reported. Exploratory PM₁₀ projections suggest that concentrations may remain above WHO guideline levels through 2030, although these projections should be interpreted cautiously because meteorological drivers were not included in the modelling framework. The findings highlight the need for seasonal interventions to control particulate matter, particularly in winter and pre-monsoon. Measures such as stricter emission regulations, industrial controls, and public awareness campaigns are essential for mitigating health risks. This study provides a comprehensive understanding of air-quality dynamics in Chattogram and offers a framework for targeted pollution-control strategies. Implementing these strategies can improve air quality, protect public health, and support sustainable urban development. Full article

Earthen plasters are attracting interest as low-impact, vapour-open finishing systems, yet most evidence still derives from laboratory characterization rather than from full-scale exposure. Their application in real buildings is still constrained by regulatory and material-related barriers, as national regulatory frameworks remain uneven and existing guidelines provide limited support for fibre-reinforced earthen mixtures. Moreover, natural soils vary in composition, making standardization and quality control difficult. In Mediterranean climates, vapour-open materials can support passive moisture regulation. However, seasonal changes in solar exposure and rainfall make full-scale assessment under real operating conditions necessary. This study assesses the in situ hygrothermal behaviour of an experimental circular earthen plaster, formulated with marble-processing dust and sisal fibres, against a natural hydraulic lime (NHL) reference. Two near-identical hollow-clay-block masonry test boxes were built near Catania (Southern Italy, Köppen Csa) and monitored under free-running conditions across winter, transition and summer campaigns in 2026, recording surface temperatures, indoor air temperature, relative humidity and CO₂. In winter, the earthen finish reduced the daily internal surface amplitude from 4.9 °C to 4.2 °C consistently on every paired monitoring day. During the transition period, surface differences were negligible, but relative humidity emerged as the discriminating variable, the earthen room remaining higher and more stable. In summer, the hygroscopic buffering became most evident, with the earthen room holding indoor humidity near 72% almost unchanged across a near-five-degree seasonal warming. A difference in solar absorptance between the two external finishes was identified and quantified, reducing the external surface peak of the earthen prototype by about 2 °C at maximum west-wall irradiance. The results support the use of full-scale monitoring for circular earthen plasters, advancing scientific understanding of circular earthen plasters under Mediterranean exposure and providing applied evidence for their performance-oriented use. Full article

Biogenic volatile organic compounds released from soil (SBVOCs) are an important component of the material exchange and information transmission between terrestrial ecosystems and the atmosphere. Soil ecosystems act as both critical sources and frequently overlooked sinks of BVOCs. SBVOC emissions are mainly regulated by the temperature, moisture, and pH of the soil. Climate warming may enhance volatilization and microbial production in the short term. However, its long-term effects depend on drought, vegetation composition, substrate availability, permafrost thaw, and microbial acclimation. SBVOCs also influence microbial activity, nutrient cycling, plant–microbe interactions, plant defence, and below ground trophic interactions, although the strength of evidence differs among these functions. Ecologically, SBVOCs promote carbon cycling, modulate plant-microbe interactions, and influence atmospheric chemistry. This review further synthesizes SBVOC emission and uptake patterns across different climatic zones. Several challenges remain, particularly the scarcity of long-term quantitative measurements and difficulties in distinguishing multiple emission sources. Our understanding of rhizosphere interactions and climate-change feedback is also limited. It is essential to enhance long-term observational studies and optimize models to deepen our understanding of the role of SBVOCs in the global carbon cycle and air quality. Full article

Trace elements bound to PM_2.5 constitute crucial factors increasing human health risks. To optimize health-oriented air quality management strategies for industrial cities, this study monitored major trace elements in PM_2.5 in Wuhan, China, from June 2023 to May 2024. During the study period, the mean concentration of trace elements was 3290 ± 2270 ng/m³, comprising 93.9% crustal elements and 6.1% heavy metals. The positive matrix factorization model identified fugitive dust as the primary source of trace elements, with a mean contribution of 35.6%, followed by traffic emissions (21.8%), industrial emissions (19.1%), biomass and waste incineration (12.3%), and coal combustion (11.1%). Health risk assessment revealed that the cumulative non-carcinogenic and carcinogenic risks of trace elements via inhalation exposure exceeded acceptable levels for both local children and adults, with Mn, As, and Cr as key risk factors. Although coal combustion contributed less to trace element concentrations than other sources, it was the largest contributor to non-carcinogenic and carcinogenic risks, followed by fugitive dust and traffic emissions. These results suggest that trace element pollution control in Wuhan should prioritize reducing coal combustion emissions, while emphasizing the critical importance of sustained traffic regulation and fugitive dust suppression to improve air quality and protect public health. Full article

Increasingly stringent regulations regarding climate policy and the sustainable development paradigm determine the transformation of contemporary multi-family housing typology, manifested by a growing share of single-aspect micro-apartments (units with exterior exposure on only one facade). This article identifies the phenomenon of the energy-efficiency paradox, wherein highly insulated buildings successfully trap winter heat but inadvertently escalate summer cooling demands. Consequently, the primary operational challenge becomes limiting excessive solar heat gains in summer, which directly translates into high cooling energy demand, rather than solely mitigating heat losses in winter. Sustainable construction requires moving beyond the narrowly defined reduction of envelope thermal transmittance towards holistic adaptation to climate change and ensuring adequate indoor environmental quality. The methodology is based on a coupled energy-economic analysis, evaluating thermal balances and their direct financial implications for end-users. The variant analysis of solar heat gains conducted for a reference 30 m² dwelling in Warsaw proves that architectural optimization should not be determined solely by short-term investment profit maximization. Effective engineering optimization in construction requires the implementation of a full building life cycle perspective. Unfavorable glazing orientation and the lack of cross-ventilation necessitate the use of energy-intensive air-conditioning systems, which directly increases the building’s carbon footprint and generates hidden operating costs (differences reaching over 145 PLN annually for heating and approximately 70 PLN for cooling). The findings highlight the necessity for a critical reevaluation of design priorities for compact apartments, integrating social justice (by reducing information asymmetry in the real estate market, where buyers are often unaware of these future cooling burdens) with long-term economic rationality and the resilience of the built environment to extreme weather events. Full article

Soil pollution is one of the main threats to soil ecosystem health, and the combination of microbial remediation with phytoremediation can promote contaminant degradation and contribute to the revitalization of ecosystem functions. Plant interactions with the surrounding physical and biological environments determine the formation of new ecosystems, which, similarly to natural ones, can provide several ecosystem services. Despite the increasing diffusion of phytoremediation and the large areas potentially suitable for the application of these technologies, the delivery of ecosystem services during phytoremediation interventions has rarely been investigated. In the framework of a bio-phytoremediation project, the present work explored the capacity of a new plant cover created at a site under bio-phytoremediation (area: 0.52 ha) to provide supporting, regulating, and cultural Ecosystem Services. The daily cumulative cooling effect due to plant transpiration during summer was 12.7 °C m⁻² day⁻¹, with species characterized by the highest Leaf Area Index and leaf transpiration rates (such as Chrysopogon zizanioides, evergreen shrub species, and Populus nigra) contributing the most to air cooling. Thanks to plant photosynthesis, 177 kg of C was sequestered each year, while the air pollution intercepted by the plant leaves amounted to 1.82 kg per year. After 30 months of phytoremediation, an increase in soil microbial activity indicated a progressive improvement in soil quality. Similarly, the cytometric analysis of hepatopancreatic cells from isopods indicated that the bioindicator organism actively and positively responded to the recovering environment, thus supporting the effectiveness of the ongoing remediation of soil quality. Finally, the implementation of the bio-phytoremediation intervention led to the creation of new habitats, increased ecological connectivity in the surrounding urban area, and generated an aesthetic value comparable to that of urban greenery. These analyses provided evidence that these techniques not only supported soil remediation and site securing but also contributed to improving citizen well-being in the proximity of the site and the environmental quality of the area. These significant positive externalities of phytoremediation should be considered when selecting technologies for environmental clean-up. Full article

Curbing industrial air pollution remains central to China’s sustainable transition under the dual-carbon commitment, and the digital economy has been proposed as an enabler of cleaner production. Yet most evidence centers on carbon emissions and single-dimensional digital measures, leaving the link between multi-dimensional digital development and sulfur dioxide (SO₂) emissions underexplored. We construct a multi-dimensional digital economy index (DEI) from three county-aggregated digital integration sub-indicators using principal component analysis and assemble a balanced panel of thirty provinces over 2000–2022 (N = 690). Using two-way fixed-effects estimation with cluster-robust inference, we find that DEI is negatively associated with provincial SO₂ emissions: a one-unit increase in DEI is associated with 19.2 percent lower emissions. The association survives wild cluster bootstrap inference, province-specific linear trends, alternative composite weights, two alternative SO₂ measures, and a Bartik-style exposure–shock instrumental-variable sensitivity analysis. Integration-type dimensions carry the stronger effect. A formal mediation analysis shows that digital development lowers coal reliance and raises regulation and innovation. Yet no observable channel statistically mediates the total effect. This pattern is consistent with abatement operating through emissions monitoring and compliance. The findings position digital development as a correlate of air-quality improvement and inform digital infrastructure planning under the dual-carbon framework. Full article

In the last 10 years, the global green bond market has reached an estimated value of USD 6.8 trillion. However, credibility concerns persist due to greenwashing risks and issues regarding the reporting system. The current measurement, reporting, and verification systems (MRV) have high uncertainty levels of 10–30%, and so they contribute to information asymmetries and fuel investor skepticism when allocating capital to green bond instruments. The scope of this study is to develop an integrated management approach that links air quality and greenhouse gas monitoring with financial incentives throughout the lifecycle of green bonds. The central contribution is a four-phase lifecycle model covering issuance, allocation, monitoring, and impact reporting, which systematically identifies where greenwashing risks and verification gaps arise across the investment cycle. Methodologically, the study combines qualitative content analysis, a novel Disclosure Quality Score (DQS) instrument, based on the Regulation (EU) 2023/2631, four documentary case studies, and an advanced verification framework. The content analysis shows that regulatory and market-performance studies dominate the literature, while integrated lifecycle verification frameworks remain less explored. The DQS uses eight indicators, applied to a matched sample of green bonds, in accordance with the European Green Bond Standard (EuGB) and the ICMA Green Bond Principles (GBP). The results demonstrate that bonds issued under the EuGB present higher disclosure quality (mean DQS = 15.4/16) compared to GBP-aligned bonds (mean DQS = 11.4/16). Case studies show strong issuance-stage disclosure, but weak post-issuance verification. The framework enables lifecycle-wide accountability by reducing information asymmetry. The proposed lifecycle framework and DQS instrument offer a replicable model for improving disclosure quality and ESG performance standards, with direct implications for sustainable investment screening and ESG fund selection. Overall, the findings show that improving green bond credibility requires moving beyond issuance-focused disclosure toward lifecycle-wide verification. Full article