Pollution Control Research Articles

The establishment of blue-sky index: how to quantify the aerosol optical impacts on sky color

Abstract Color of the sky serves as a direct indicator of haze, while also exerting substantial influence on human physiological and psychological well-being, as well as the overall environmental scenery. However, quantifying color changes is quite challenging. This research develops a quantitative approach for evaluating the influence of atmospheric aerosol pollution on the appearance of the sky. We first calculated the influence of atmospheric aerosols on the sky’s diffuse radiation, which is the source of sky color. Then, we mapped the diffuse radiation onto a perceptually uniform color space to quantify alterations in sky color. The results reveal that the relationship between aerosol concentration and sky color change follows a logarithmic-like distribution: the higher the concentration, the weaker the change in sky color per unit increase in aerosol concentration. Consequently, during the early phases of air pollution control implementation, there may be minimal observable changes in the color of the sky. However, as these measures are further enforced, a discernible bluing effect on the sky will become evident. Based on the quantification of the change of sky color, a blue-sky index (BSI) was established. We find that concurrent with improvements in air quality resulting from emission reduction measures, the BSI has significantly decreased in recent years in China. This trend indicates an increase in the frequency of blue-sky occurrences.

Toward Sustainable Non‐Emitting Asphalts: Understanding Diffusion–Adsorption Mechanisms of Hazardous Organic Compounds

AbstractAdvancing sustainable materials requires addressing their environmental impacts, particularly emissions. This study contributes to the development of sustainable, non‐emitting asphalt by providing a detailed understanding of the diffusion and adsorption behaviors of hazardous organic compounds (HOCs) emitted from asphalt. Using molecular simulations and quantum analysis, it is investigated how the diffusion and adsorption characteristics of sulfur‐ and oxygen‐containing HOCs change as aging progresses in asphalt. The results show that oxidation reduces the diffusion rate of HOCs and increases their adsorption energy. Dispersion forces and electrostatic attractions are key mechanisms stabilizing HOCs within the asphalt matrix. As oxidation progresses, hydrogen bonding and polar interactions between asphaltenes and highly polar HOCs become dominant. Among the asphalt components, asphaltenes, followed by resins, have the most significant impact on HOC binding. Additionally, non‐aromatic HOCs exhibit higher diffusion rates than aromatic HOCs. These findings provide crucial insights into the emission mechanisms of asphalt over its service life and offer guidance for designing future, sustainable, emission‐free asphalts. By reducing harmful emissions, this research contributes to pollution control, improved air quality, and the broader goal of sustainable pavement development.

Effects of Gas Flaring On Air and Groundwater Quality in Ebedei and Ashaka, Located in Ukwuani, Delta State, Nigeria

This research examines the effects of gas flaring on air and groundwater quality in Ebedei and Ashaka, located in Ukwuani, Delta State, Nigeria. Data on air pollutants, including sulphur dioxide (SO₂), nitrogen dioxide (NO₂), and carbon dioxide (CO₂), as well as groundwater quality parameters, were collected during both the wet and dry seasons through systematic sampling techniques. The findings indicate that levels of SO₂ and NO₂ exceeded the permissible limits set by the World Health Organization (WHO), posing significant threats to air quality and public health. Conversely, CO₂ concentrations remained within acceptable ranges. Groundwater analysis revealed slightly acidic pH levels, elevated biochemical oxygen demand (BOD), and high concentrations of iron, lead, and phosphates, all surpassing WHO standards and pointing to contamination caused by industrial emissions and acid rain. Statistical analyses demonstrated strong links between SO₂ and NO₂ emissions and groundwater quality, highlighting their harmful effects. Seasonal differences in pollutant levels were minor, suggesting that human activities are the primary source of pollution. The study emphasizes the urgent need for stricter environmental policies, effective pollution control measures, and ongoing monitoring to protect local communities and ecosystems.

Source Apportionment and Analysis of Potentially Toxic Element Sources in Agricultural Soils Based on the Positive Matrix Factorization and Geo-Detector Models

The potentially toxic element pollution of agricultural soils has become a significant environmental threat to food safety and human health. Accurately identifying sources of potentially toxic element pollution is key to developing effective pollution prevention and control measures. In this study, regional potentially toxic element pollution of the soils in the Nanliujiang River Basin was analyzed using the positive matrix factorization (PMF) model and the geo-detector model. First, topsoil samples from the study area were collected to analyze eight potentially toxic elements in the soil, including As, Cd, Cr, Cu, Hg, Ni, Pb, and Zn. The PMF model was used to conduct source apportionment of the potentially toxic element data and identify the primary pollution sources and their contribution rates. Then, the geo-detector model was used to analyze the key factors affecting the spatial distribution of the potentially toxic elements and the influence of natural and human factors on the distribution of the potentially toxic elements. There are four potentially toxic element pollution sources of the agricultural soil in the study area: geological background, agricultural activities, industrial discharge, and river irrigation. The geological background contributed the most. The main factors affecting the spatial distribution of potentially toxic elements included agricultural activities, industrial discharge, and river irrigation. This integrated method can analyze the formation of potentially toxic element pollution in depth from the perspectives of source apportionment and spatial differentiation and provide a scientific basis and decision support for preventing and controlling potentially toxic element pollution in agricultural soils. This study provides a new method and scientific basis for identifying and preventing potentially toxic element pollution sources in agricultural soil and can guide the formulation of targeted soil pollution control measures.

A Review of Air Pollution Research in Panzhihua City from 2018 to 2023

Air pollution is a critical issue of concern to society, and researches on this topic has notably increased in recent years. Panzhihua City, a key resource-consuming and heavy industrial city in the southwestern region of China, places air pollution prevention and control at the top of its priorities. However, there is currently a lack of comprehensive reviews on air pollution studies specific to Panzhihua. This paper reviews the research conducted on air pollution and its control methods in Panzhihua City between 2018 and 2023. Ten relevant studies were included, the pollution levels of heavy metals and mineral particles in atmospheric dustfall, PM2.5, PM10, SO2, CO, NO2, and O3 were summarized. The paper also outlined the trends, potential causes of air pollution in Panzhihua, and suggested control measures, aiming to provide a reference for future research and offer a scientific basis for local government policy-making regarding air pollution control

Body Condition and Blood Biochemistry of Free-Range Caiman latirostris in Northeast Brazilian Atlantic Forest.

The Atlantic Forest broad-snouted caiman (Caiman latirostris) inhabits regions within one of the world's most ecologically diverse ecosystems, yet few studies have explored the relationship between body condition, blood biochemistry, and environmental factors in the wild. Our study investigated the effects of sex, ontogeny, habitat, and environmental variables on the body condition and blood biochemistry of free-ranging caimans from the state of Alagoas, Northeast Brazil. From 2020 to 2022, we captured 75 caimans across three sites in different seasons. Results revealed sex-specific responses to seasonal and Interannual weather changes, with females showing higher body condition in the wet season, while males peaked in the dry season. Elevated glucose, total protein, albumin, triglycerides, and fructosamine were linked to higher body condition and larger individuals, while elevated aspartate aminotransferase to low body condition. Seasonal rainfall influenced blood parameters, with the dry season associated with higher creatinine, calcium, and alanine aminotransferase levels, and the wet season with higher total protein, sodium, and potassium. Differences in glucose, alkaline phosphatase, and gamma-glutamyl transferase across sites pointed to physiological effects of human activities. Blood biochemical values varied widely, with some exceeding reported species ranges. These findings highlight the need to interpret physiological data within the context of local habitat and environmental conditions. Conservation strategies should go beyond species presence and habitat preservation, incorporating pollution control. Our study advances understanding of Caiman latirostris ecophysiology, offering valuable insights for the conservation and management of crocodilian populations in both wild and captive environments.

Contaminated Characteristics Variation in Different Aquaculture Modes: A Case Study in Northern China

Various aquaculture modes have been developed to satisfy the growing demands of aquatic products. The contaminated characteristics may distribute along with the aquaculture modes, threatening the ecological environment to varying degrees. Herein, the five most common aquaculture modes (small-scale intensive mode, extensive free-range mode, concentrated contiguous mode, funnel-type mode, and recirculating aquaculture system) were selected to study the contaminated characteristics (including nine kinds of water quality parameters and eight kinds of antibiotics) in Henan Province, a province in northern China, and analysed using high-performance liquid chromatography tandem secondary mass spectrometry (HPLC–MS/MS). The funnel-type mode, as a unique mode developed in Henan Province, appears highest in nutrient content, wherein TN and TP concentrations reach 29.28 mg/L and 2.20 mg/L, respectively. The small-scale intensive mode has the highest average antibiotic concentration in five different aquaculture modes, with a concentration of 502 ng/L. Overall, the most abundant antibiotic was quinolones (QNs), followed by sulfonamides (SAs), chloramphenicols (CAs), and tetracyclines (TCs). Pearson correlation analysis showed that ENR had a strong positive correlation with TN, TP, and Zn, indicating the enrofloxacin (ENR) may have existed as the addictive in aquaculture feed. Moreover, the risk quotient (RQ) analysis indicated that ENR posed a medium to high risk, highlighting the importance of antibiotics man-agement in aquaculture. This work provides theoretical guidance for the formulation of aquaculture water pollutant control of different aquaculture modes.

The Optimization of River Network Water Pollution Control Based on Hydrological Connectivity Measures

Urbanization, driven by socio-economic development, has significantly impacted river ecosystems, particularly in plain city regions, leading to disruptions in river network structure and function. These changes have exacerbated hydrological fluctuations and ecological degradation. This study focuses on the central urban area of Changzhou using a MIKE11 model to assess the effects of four hydrological connectivity strategies—water diversion scheduling, river connectivity, river dredging, and sluice connectivity—across 13 different scenarios. The results show that water diversion, river dredging, and sluice connectivity scenarios provide the greatest improvements in water environmental capacity, with maximum increases of 54.76%, 41.97%, and 25.62%, respectively. The spatial distribution of improvements reveals significant regional variation, with some areas, particularly in Tianning and Zhonglou districts, experiencing declines in environmental capacity under sluice diversion and river-connectivity scenarios. In addition, the Lao Zaogang River is identified as crucial for improving the overall water quality in the network. Based on a multi-objective evaluation, combining environmental and economic factors, the study recommends optimizing water diversion scheduling at sluices (Weicun, Zaogang, and Xiaohe) with flow rates between 20–40 m3/s, enhancing connectivity at key river hubs, and focusing management efforts on the Lao Zaogang and Xinmeng rivers to strengthen hydrological and water quality linkages within the network.

Response Mechanism of Plants to Cadmium Pollution in Soil

Cadmium (Cd), as a widespread heavy metal pollutant in soil, has become one of the globally recognized contaminants due to its high toxicity and bioaccumulative properties. Soil cadmium pollution not only hinders the normal growth of plants but also poses a threat to human health through the food chain. Microbe-plant combined remediation is an essential approach for the treatment of heavy metal contamination in soil. Plants primarily respond to cadmium stress through intrinsic physiological and biochemical adjustments, including inhibiting cadmium absorption, promoting cadmium compartmentalization in vacuoles, and facilitating cadmium efflux from cells. Moreover, plants enhance their tolerance to cadmium through mechanisms such as the regulation of plant hormones. Gene expression regulation is the molecular mechanism underlying plant cadmium tolerance. To date, multiple resistance genes, transcription factors, and microRNAs involved in cadmium tolerance have been identified. Exogenous additives mitigate the effects of cadmium stress on plants by chemical adsorption, enhancing plant cadmium tolerance, and improving the physical and chemical properties of the soil, as well as the structure of soil microbial communities. Investigating the mechanisms by which plants respond to cadmium stress and exploring remediation measures for cadmium pollution will provide a basis for developing effective pollution control and remediation strategies.

Study on the coupling role and forecasting of energy-economy-environment triple system based on system dynamics approach, taking Inner Mongolia autonomous region as an example

The sustainable development of Inner Mongolia, particularly the coordinated development of energy, economy, and environment, plays a crucial role in shaping energy strategies and environmental protection policies for both Inner Mongolia and China. Based on this, the study focuses on the energy-economy-environment coupling in Inner Mongolia, employing system dynamics for multi-scenario simulations. The findings reveal: (1) the overall coupling coordination degree is improving, with the energy-environment friendly scenario yielding the best results; (2) industrial pollution and energy consumption are significant factors influencing coupling coordination; (3) addressing energy consumption and achieving carbon neutrality are long-term challenges for Inner Mongolia’s sustainable development. Therefore, Inner Mongolia should optimize its industrial structure, promote high-tech and low-carbon industries, improve energy efficiency, develop renewable energy, and strengthen pollution control and carbon emission management to achieve sustainable development across its economy, energy, and environment.

Wastewater Treatment with Geotextile Filters: The Role in Permeability and Pollutant Control

Wastewater Treatment with Geotextile Filters: The Role in Permeability and Pollutant Control

Mitigating Air Pollution and Protecting Public Health: Analyzing the Impact of National Clean Air Programme in Kota, Rajasthan

The clean air plan in India involves a set of rules, policies, and initiatives targeted at improving the air quality and public health by way of decreasing emissions from various sources. The study aims to evaluate the impact of National Clean Air Program (NCAP) on lowering air pollution levels and improving public health outcomes in Kota city, Rajasthan, highlighting progress, challenges, and the need for sustained emission control efforts. Kota's selection for this study highlights its significance as an educational hub, attracting students from all over India. The rapid population growth and increased vehicle emissions in the city cause adverse impacts on air quality. Improving air quality will not only enhance the health of residents and students but also contribute to a more conducive learning environment. The action plan of NCAP involves enforcing the construction and demolition waste management rules 2016, implementing emission control measures like water sprinkling and covered transport for construction activities, and extensive campaigns against open burning of biomass and waste. It also includes regular checks on industrial emissions, proper waste collection and disposal, and mandatory green belt development in residential areas. It employs a mixed-method approach, combining air quality monitoring data collected from the Central and State Pollution Control Boards from 2014 to 2023. It also examines trends in key pollutants, including NO2, SO2, and PM10, and analyzes the effect of regulatory measures such as emission controls and waste management rules. The study reveals a decreasing trend in NO2 (nitrogen dioxide) levels in Kota city, Rajasthan from 35.35 µg/m³ to 29.90 µg/m³ during 2014 to 2023, showing a significant drop during the COVID-19 lockdown. Similarly, PM10 (particulate matter) levels peaked at 153.28 µg/m³ in 2018 but saw a significant reduction to104.80 µg/m³ by 2020, indicating an improvement in air quality. However, SO2 (sulfur dioxide) concentrations slightly increased in 2019-2023 compared to 2014-2018. The air quality index (AQI) improved modestly but frequently surpassed 100, indicating hazardous air quality for vulnerable populations. The study concludes that while the NCAP in India has significantly improved air quality, challenges remain, with NO2 levels rebounding post-COVID-19 lockdown and persistent high particulate matter levels. It is recommended to ensure stricter enforcement of emission control measures, enhanced monitoring systems, and public awareness campaigns. Future work should focus on the long-term health impacts of particulate matter and strategies to achieve sustained air quality improvements in high-risk regions.

Monitoring the trends of carbon monoxide and tropospheric formaldehyde in Edo State using Sentinel-5P and Google Earth Engine from 2018 to 2023.

This research was carried out to assess the concentrations of carbon monoxide (CO) and formaldehyde (HCHO) in Edo State, Southern Nigeria, using remote sensing data. A secondary data collection method was used for the assessment, and the levels of CO and HCHO were extracted annually from Google Earth Engine using information from Sentinel-5-P satellite data (COPERNISCUS/S5P/NRTI/L3_) and processed using ArcMap, Google Earth Engine, and Microsoft Excel to determine the levels of CO and HCHO in the study area from 2018 to 2023. The geometry of the study location is highlighted, saved and run, and a raster imagery file of the study area is generated after the task has been completed with a 'projection and extent' in the Geographic Tagged Image File Format (.tiff) and downloaded from the Google Drive and saved into folders, imported into the ArcMap for data processing and Excel worksheet for analysis. The raster data were collected annually for each pollutant with the 'filterDate = year-01-01; year-12-31'. Results showed that the annual mean concentrations of CO ranged from '4.67 × 10-2mol/m2' to '5.34 × 10-2mol/m2'. The maximum concentration was found in the year 2018 and the minimum was found in the year 2023, a relatively high concentration of CO may lead to the formation of carboxyhaemoglobin which decreases the capacity of the blood to transport oxygen causing lung cancer, heart problems, respiratory conditions and damage to other organs. While the annual mean concentrations of HCHO ranged from '1.89 × 10-4mol/m2' to '2.18 × 10-4mol/m2', the maximum concentration was found in the year 2021 and the minimum was found in the year 2019, increasing concentration of HCHO may be due to biomass burning and the combustion of methane (CH4 gas), and can cause nasopharyngeal cancer in humans. Based on the result of this study, constant monitoring of the air quality and atmospheric pollutants to ensure early detection of a decrease or increase in the concentration of atmospheric pollutants, implementation of air pollution control policies, spatial data collection, air quality modelling, hotspot identification and source distribution using the geographic information system (GIS), promotion of cleaner technologies, including the use of low-emission vehicles and renewable energy sources, public awareness and education on the impact of atmospheric pollutants and the human contributions to the increasing production of atmospheric pollutants are highly recommended.

Treated wastewater disturb the distributions of microplastics in their receiving watersheds.

Microplastics (MPs) are ubiquitous in aquatic environments, threatening the security of aquatic organisms. Identifying the emission node and hot spot of MPs holds significant importance in the pollution control of MPs. Wastewater is widely recognized as sink and source of MPs, while the direct evidence is insufficient. To confirm the impact of the treated wastewater on the distribution of MPs in their receiving watersheds, MPs in surface river water and sediment samples collected around a typical industrial (petrochemical) and a municipal wastewater treatment plant (PWWTP and MWWTP) were identified. Results revealed that effluent from the PWWTP and water near the outfall of the MWWTP owned the most abundant MPs of 1280, and 723 items/L, respectively. Moreover, abundances of MPs in samples collected downstream of WWTPs (795 items/L in surface river water, 2142 items/kg in sediment for PWWTP, and 517 items/L, 1057 items/kg for MWWTP) consistently exceeded those of upstream (639 items/L, 926 items/kg for PWWTP, and 417 items/L, 700 items/kg for MWWTP). In addition, the discharge of treated petrochemical wastewater elevated the diversity of MPs while treated municipal wastewater elevated the relative content of narrow MPs or fibers in their downstream watersheds. In summary, treated wastewater do influence the distribution of MPs within their receiving watersheds.

Low-cost Ozone Measurement Device in the Chappuis Band

Ground level ozone in the atmosphere is an air pollutant. This is formed in the atmosphere through a complex reaction of the chemical substances emitted from the vehicles, plants and many other sources. Its presence close to the earth is harmful to humans, animals, plants and non-living things. Different countries have different permissible level of concentration of ozone in the atmosphere. The Central Pollution Control Board of India has set the permissible limit for ozone concentration at 100 ?g/m3 over 8 hours. Hence, it is very essential to know the concentration of ozone in the atmosphere for healthy living. There are various types of ozone measurement devices. Optical absorption based UVC-type ozone measurement devices are costly and there is necessity to replace ozone scrubbers used in those devices at regular intervals. Mercury lamps used in these optical absorption based ozone measurement devices produce harmful UVC rays. Mercury lamps also have a shorter life period. To overcome these shortcomings, a low cost LED based Ozone measurement device has been developed and concentration of ozone can be measured by this device. In this investigation, Yellow-Green, Diffused Yellow, DIP Yellow, Amber, and Orange LEDs have been used to generate incident light sources from 573 nm to 605 nm wavelengths. In the detector stage, available 565 nm and 580 nm peak sensitivity photodiodes have been used to measure the reduced intensity using the Beer-Lambert Law. It is found that DIP and Diffused yellow LEDs show better results among these LEDs when tested by 565 nm and 580 nm photodiodes. The use of LEDs and Photodiodes makes this system low-cost in comparison to other available ozone-measuring systems.

Revealing sources for synergistic control of PM2.5, O3, and CO2 in China: Based on social costs of air pollution and climate impact.

China is concurrently facing the dual challenges of air pollution and climate change. Here, we established a coupled modeling framework that integrated a chemical transport model with a health impact assessment model and the human capital method, to quantify the contributions of 150 emission sources (five sectors in 30 provinces) to the CO2 emissions, and the mortality burdens attributed to O3 and PM2.5. We found that, in 2019, the estimated premature deaths in China attributed to PM2.5 and O3 pollution were 1,499,073 and 143,420, respectively. The social cost of air pollution was approximately 232 billion USD (PM2.5: 212 billion USD, O3: 20 billion USD), comparable to the social cost of CO2 emissions at 246 billion USD. The social costs of air pollution and carbon emissions attributable to the 150 emission sources exhibited significant heterogeneity. We identified the control priorities and primary control targets for each emission source. Consequently, based on the social costs of air pollution and climate impact, we proposed a synergistic emission control policy that accounted for spatial distribution and sectoral categories. This policy aimed to harmonize the control strategies for PM2.5 pollution, O3 pollution, and CO2 emissions, thereby enhancing the comprehensive benefits of mitigation measures. Our study sheds light on optimizing emission control policies, enhancing the realism of relevant policy-making for synergistic control of air pollution and carbon emissions.

The impact of air pollution control measures and the COVID-19 pandemic on photosynthesis in urban trees

Phytotoxic air pollutants such as atmospheric nitrogen dioxide (NO2) are among the major stresses affecting tree photosynthesis in urban areas. We clarified the relationship between NO2 concentrations and photosynthetic function for three major urban trees, Prunus × yedoensis, Rhododendron pulchrum, and Ginkgo biloba, planted in Kyoto and surrounding cities, combining our published data and new data collected from 2020 to 2023. High NO2 increased long-term water use efficiency for all species. High NO2 decreased photosynthesis in P. yedoensis and R. pulchrum, while for G. biloba, NO2 imposed little effect on photosynthesis. We then focused on the decrease in NO2 due to (1) air pollution control measures from 2005 to 2023 and (2) the economic recession caused by the COVID-19 pandemic, and examined whether these factors improved photosynthesis in urban trees. The historic decrease in NO2 improved leaf photosynthesis for P. yedoensis and R. pulchrum, while the COVID-19 pandemic reduced NO2 by only 0.3 ppb and did not further improve photosynthesis in these tree species. This report shows that air pollution control measures improved photosynthesis in urban trees over several years in Japan, and is valuable because it demonstrates that air pollution control measures can increase CO2 uptake by urban trees.

Are Pollution Control Bonds and Public Ownership Really Blessing for Utility Firms?

Are Pollution Control Bonds and Public Ownership Really Blessing for Utility Firms?

Construction of Key Technology System for Mine Ecological Restoration Under System Perspective

Mine ecological restoration has experienced a long-term development process in China, in which various technologies have been constantly developing and integrating. Based on the related theoretical research and field program, the technical system of mine ecological restoration was constructed, and the characteristics of key technologies were specifically grasped. In this research, the environment, including natural elements and the spatial environment, is the object of mine ecological restoration, which requires further long-term investigation and monitoring. Therefore, natural element restoration technology, space environment restoration technology, and environmental survey and restoration monitoring technology should be considered when establishing technical systems. The research showed that： ① In mine natural element restoration, where soil and water are important, traditional technologies like pollution abatement with physical, chemical, and biological methods have been extensively used. Meanwhile, artificial soil reconstruction and multi-technology joint remediation became the main study focus in soil restoration and artificial wetlands have been gradually constructed as a new method in water restoration, covering water system restoration and pollution control. ② The two tasks of space environment restoration were geological disaster prevention and vegetation re-greening. Major technologies of the former were applied to surface mine slope treatment and mining subsidence area control, the latter of which could be divided into three technical links： vegetation selection, construction, and maintenance. Although many technologies are valid, a few frontiers need to be further pursued. ③ The mine environmental investigation and restoration monitoring were based on 3S technologies, containing GIS, GPS, and RS, all of which are developing rapidly but still have a large space for integration and innovation.

The short-term comprehensive impact of the phase-out of global coal combustion on air pollution and climate change.

With the continuous intensification of global warming, the reduction and ultimate phase-out of coal combustion is an inevitable trend in the future global energy transformation. This study comprehensively analyzed the impact of phasing out coal combustion on global emissions and concentrations of air pollutants, radiative fluxes, meteorology and climate using Community Earth System Model 2 (CESM2). The results indicate that after the global phase-out of coal combustion, there is a marked decrease in the concentrations of sulfur dioxide (SO2), nitrogen oxides (NOx) and fine particulate matter (PM2.5), with some regions experiencing a reduction of exceeding 50%. There is no significant change in global ozone (O3) concentration. There are decreasing AOD and positive radiative fluxes globally in the short term, though the cloud contributes minor negative radiative fluxes. The global air temperature may increase by approximately (0.02±0.15) °C on average with regional and seasonal variations, and the precipitation may potentially increase by approximately (2.7±40.6) mm yr-1 globally and over 20% in equatorial regions in the short term. But combined with the decreasing trend of cloud water content in the Northern Hemisphere, it indicates a potential increase in the extremity of precipitation events. This study provides references for global control of air pollution, mitigation strategies of climate change, and transformation of energy structures under the objective of "carbon neutrality", such as focusing on the negative climate impacts of exacerbating regional warming and increasing extreme precipitation resulting from the rapid reduction of aerosols in the short term.