
China has been the world's largest emitter of greenhouse gases and mercury since 2006, with its emissions continuing to increase. The country's rapid economic growth has been powered by coal, with coal-burning contributing to air pollution that threatens both Chinese citizens and the world. While China has taken steps to reduce pollution, such as increasing afforestation and investing in renewable energy sources, it still faces challenges in meeting its environmental goals. The country's emissions of carbon dioxide have decreased by 1.6% in the first quarter of 2025 compared to the previous year, indicating a positive direction. However, there is still a long way to go to ensure a sustainable future for China and the world.
| Characteristics | Values |
|---|---|
| Annual premature deaths due to air pollution | 350,000-400,000 |
| Annual premature deaths due to indoor air pollution | 300,000 |
| Annual premature deaths due to poor water quality | 60,000 |
| Total annual premature deaths due to air and water pollution | 760,000 |
| Total number of premature deaths due to air pollution since 2000 | 30 million |
| Particulate matter formed from primary sources | Coal combustion, biomass combustion, and traffic |
| Particulate matter formed from secondary sources | Atmospheric oxidation and reactions of gaseous organic compounds |
| Chinese cities with the highest levels of particulate matter in 2004 | Tianjin, Chongqing, and Shenyang |
| Decline in fine particulate air pollution (PM2.5) since 2014 | 41% |
| Percentage of the population living in areas exceeding the national standard of 35 µg/m³ for particulate pollution | 30.9% |
| China's contribution to global carbon emissions in 2024 | 30% |
| China's ranking as an annual emitter of greenhouse gases | 1st |
| China's ranking as an annual emitter of mercury | 1st |
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What You'll Learn

Greenhouse gases and mercury emissions
China is the world's largest emitter of greenhouse gases, with its emissions exceeding the combined emissions of the developed world as of 2019. In 2023, China emitted over 12.6 gigatonnes (Gt) of CO2eq of greenhouse gases, accounting for 35% of the world total. China's per capita emissions are over 10.1 tonnes of CO2eq emitted per person each year, which is higher than the world average and the EU average.
China's greenhouse gas emissions stem mainly from coal burning, including coal power, coal mining, and blast furnaces producing iron and steel. In 2018, coal constituted 69.9% of the country's energy consumption. 79% of China's CO2 emissions are from coal burning, and the country produces over 14% of global methane emissions from coal mines. China is also the largest emitter of nitrous oxide, which has 300 times the warming effect of carbon dioxide. Other sources of China's greenhouse gas emissions include waste treatment, which accounts for 7.06% of total emissions, and agriculture, which produces methane through livestock and rice production.
China has faced domestic and international pressure to address its environmental impact while maintaining economic growth. China has pledged to reduce its emissions intensity by 60 to 65% as part of the Paris Agreement, and targets laid out in this agreement are likely to be met. However, these reductions are not enough to combat global warming. China's emissions have also been temporarily reduced due to the coronavirus outbreak and lockdowns, which slowed down manufacturing, construction, transportation, and overall economic activity.
Mercury emissions have also significantly impacted China's environment and public health. Human activities, including economic sectors such as mining, industry, and residential combustion, have emitted substantial mercury into the atmosphere. China's mercury emissions have been declining since the 2010s, but the geographical distribution of these emissions and their deposition within and outside the country remain important concerns. Mercury deposition has led to severe health risks for exposed populations through the intake of Hg-containing foods such as rice, vegetables, pork, poultry, and fish.
To address mercury emissions, China has implemented policies under the Minamata Convention, which aims to prevent mercury from entering the atmosphere. Combining climate and mercury policies can further reduce mercury emissions and change their geographical distribution. The implementation of a national carbon price and air pollution controls, along with China's Paris Agreement pledge, can help reduce mercury pollution.
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Air pollution and health
China's air pollution is a major public health issue that not only affects its citizens but also has global implications. The country's rapid industrialization and urban growth have led to intense levels of air pollution, threatening social, economic, and political stability. The burning of fossil fuels, vehicle emissions, industrial activities, and coal-burning power plants are significant contributors to China's air pollution.
According to the World Health Organization (WHO), particulate matter (PM), including PM2.5 and PM10, ozone (O3), nitrogen dioxide (NO2), and sulfur dioxide (SO2) are the main pollutants of concern. PM2.5, consisting of fine particles less than 2.5 microns in diameter, poses the greatest danger to human health. These particles can penetrate deep into the lungs, enter the bloodstream, and cause respiratory and cardiovascular issues, including stroke, heart disease, lung cancer, and respiratory infections.
The health impacts of air pollution in China are severe. According to various estimates, air pollution is responsible for hundreds of thousands to millions of premature deaths annually in China. A study in the medical journal The Lancet reported that approximately 1.24 million people died from exposure to air pollution in China in 2017. The Chinese Ministry of Health has also acknowledged that industrial pollution has made cancer the leading cause of death in the country.
The effects of China's air pollution extend beyond its borders. Measurements have shown that traces of smog from mainland China have reached as far as California. Additionally, international trade redistributes emissions related to the production of goods, impacting global air pollution. Studies suggest that Chinese air pollution related to exports contributes to sulfate pollution over the western United States.
China has recognized the severity of its air pollution problem and has made efforts to address it. Since declaring a “war against pollution” in 2014, China has achieved significant progress in reducing pollution levels. Between 2016 and 2018, the number of cities meeting national air quality standards increased. By sustaining these improvements and implementing stricter standards, China can continue to improve the health and well-being of its citizens and contribute to global efforts to combat air pollution.
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Water pollution
China's water crisis is both natural and man-made, with climate change and socioeconomic development and urbanization over the past 40 years making the water environment situation increasingly complex. China's water resources are estimated to be only 2,000 cubic meters per capita, a quarter of the global average.
In 2018, the Ministry of Ecology and Environment (MEE) reported that 6.9% of surface water in China’s river basins was “Below Grade V” quality, meaning it was so polluted that it was unfit for any use. Another 18.9% was only suitable for agricultural or industrial use, and 70.7% required proper treatment before it could be used as drinking water. According to the 2018 “China’s Water Resource Bulletin”, only 81.6% of rivers, 25.0% of lakes, 87.3% of reservoirs, and 23.9% of shallow groundwater met the criteria for drinking water supply sources.
The discharge of industrial wastewater, domestic sewage, agricultural hazardous pesticides, and manure has polluted the surface water and groundwater. In 2015, 3.78 billion cubic meters of untreated wastewater was discharged across China, dumped into rivers and lakes. This is due in part to insufficient nationwide standards for the treatment of sewage, as well as a lack of water supply and sewage treatment infrastructure. The treatment of water as a common property resource has also contributed to the problem.
The Chinese government has attempted to address the issue, issuing the Action Plan for Prevention and Control of Water Pollution in 2015, and amending the Water Pollution Prevention and Control Law in 2017. The government has also spent billions of dollars on water projects, and issued stricter regulations on pollutants.
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Economic impact
China's rapid economic growth has lifted millions out of poverty, but it has also resulted in immense environmental degradation. The country's growth has been powered by coal, a cheap but highly polluting source of energy. In 1990, 76.2% of all energy consumed in China was generated by coal. Although this figure has decreased over time, coal still accounted for 57.7% of China's energy consumption in 2019. China has also funded about a quarter of the coal plants being built globally.
China's coal-based energy production has released tens of billions of tonnes of carbon dioxide into the atmosphere, with the country being the world's leading annual emitter of greenhouse gases since 2006. In 2021, China released over 12 billion tonnes of carbon dioxide, accounting for over 30% of the world's total emissions. The country's energy-related emissions of carbon dioxide have increased by more than 80% between 2005 and 2019.
China's environmental degradation has imposed severe health costs, undermining human capital, a critical determinant of economic productivity. Air and water pollution correlate with rising incidences of respiratory diseases, chronic conditions, and mental health burdens, disproportionately affecting vulnerable populations. This deterioration in health escalates public healthcare expenditures and diminishes workforce efficiency, creating a feedback loop that jeopardizes both environmental and economic resilience.
China's air pollution also has global economic implications. Air pollution contributes to millions of premature deaths worldwide each year, and China's emissions threaten global health and the world's economy. According to a study in the medical journal The Lancet, an estimated 1.24 million people died from exposure to air pollution in China in 2017. Since 2000, the number of deaths from air pollution in the country has exceeded 30 million.
Despite these challenges, there are signs of progress. China has made significant commitments to addressing global climate change through the 2015 Paris Agreement, pledging to peak carbon emissions by 2030 and increase the share of non-fossil fuels to 20% by the same year. In 2020, President Xi Jinping announced China's goal to be carbon neutral by 2060. China also spent $546 billion on a "low-carbon energy transition" in 2022, nearly half of the global total. Furthermore, China has been rapidly increasing its forest cover, and its surface water quality in the south has been improving.
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Efforts to reduce pollution
China's pollution has had devastating effects on the health of its citizens, with estimates of 300,000 premature deaths each year due to outdoor air pollution. In response, China has implemented several measures to reduce pollution and mitigate its environmental impact.
One significant effort is the country's transition from coal to natural gas. China has prohibited new coal-fired power plants and shut down several old plants in highly polluted regions. Additionally, millions of homes and businesses are making the switch from coal to natural gas, contributing to reduced pollution levels.
China has also taken steps to increase its renewable energy sources. The country has installed a considerable number of solar and wind energy sources, with more than half of the world's solar and wind installations occurring in China in recent years. This shift towards renewable energy has helped China reduce its carbon emissions and slow down the growth of its emissions.
Another key strategy is the implementation of afforestation and reforestation programs, such as the Great Green Wall. China has invested heavily in these initiatives, planting over 35 billion trees across 12 provinces. These programs have contributed to improved air quality and reduced pollution levels.
Furthermore, China has introduced the Air Pollution Action Plan, which has significantly improved air quality in major cities. Large cities like Shanghai, Shenzhen, and Guangzhou have restricted the number of cars on the road and introduced all-electric bus fleets. The country has also reduced its iron and steel-making capacity and shut down coal mines, further contributing to pollution reduction.
China has also addressed financing challenges for renewable energy projects by providing financial support to enterprises through the Innovative Financing for Air Pollution Control Program. This program has helped reduce carbon dioxide emissions and contributed to the country's efforts to combat climate change.
While China has made notable progress in reducing pollution, challenges remain. Experts warn that maintaining economic growth while reducing emissions will be difficult, and social stability concerns have led to censorship of health statistics related to pollution. Nonetheless, China's efforts to combat pollution are ongoing, and the country is investing significant sums and implementing policies to improve its environmental record.
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Frequently asked questions
China is the world's leading annual emitter of greenhouse gases and mercury. The country's rapid economic growth over the past few decades has been powered by burning mountains of coal, which has released tens of billions of tonnes of carbon dioxide into the atmosphere.
A 2007 World Bank report found that outdoor air pollution was causing 350,000-400,000 premature deaths a year in China. Indoor pollution contributed to the deaths of 300,000 people, while 60,000 died from water-borne pollution. According to a study published in The Lancet, an estimated 1.24 million people died from air pollution in China in 2017.
China has made some improvements in environmental protection in recent years. Millions of homes and businesses are switching from coal to natural gas, and afforestation measures are being implemented. China is also the world's largest producer of electric cars. In 2025, China's carbon emissions decreased by 1.6% compared to the previous year, which is attributed to the country's growing use of renewable energy sources.
China's pollution not only affects its citizens but also has global implications for health and the world's economy. China's emissions contribute to climate change, which impacts people worldwide.











































