Bronte Wells
The countries that are the worst polluters are responsible for a large proportion of the world's emissions. While almost all countries are responsible for the high level of global pollution, China, the United States, India, and the European Union are the top polluters. China has been the largest emitter of CO2 for over a decade, with emissions of over 9 billion tonnes in 2023, largely due to its extensive use of coal and position as the world's biggest exporter of consumer goods. The US emitted 4.4 billion tonnes of CO2 in 2022, and while this is less than China, the average American is responsible for nearly twice as much climate pollution as the average person in China. India is the third-largest emitter of CO2, with 2.3 billion tonnes emitted in 2022, and while its per capita emissions are significantly below the global average, they are projected to increase as the country develops.
| Characteristics | Values |
|---|---|
| Countries with the highest carbon dioxide emissions | China, the United States, India, the EU27, Russia, and Brazil |
| Countries with the highest carbon dioxide emissions per capita | All located in the Arabian Peninsula due to the large share of the oil industry in their economies and their small populations |
| Country with the highest emissions in the EU | Germany |
| Country with the highest emissions in the world in 2023 | China, with more than 14 billion tons of CO2 released |
| Country with the highest per capita emissions in 2023 | Palau |
| Country with the highest national inventory per capita in 2022 | UK |
| Country with the highest carbon footprint in 2022 | UK |
| Country with the highest number of contaminated cities | India |
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What You'll Learn
China's emissions
China has been the world's largest annual emitter of greenhouse gases since 2006, with more than 14 billion tons of CO2 released. In 2020, China emitted 12.3 billion tons of CO2, accounting for 27% of global greenhouse gas emissions. China's per capita emissions are over 10.1 tons of CO2eq emitted per person per year, which is higher than the world average and the EU average but lower than the US. China's emissions are primarily driven by its extensive use of coal, with the country being home to half of the world's coal power plants.
China's economy is the second largest in the world, and its energy use and emissions continue to grow. In addition to coal, China is the world's fifth-largest oil producer and the second-largest consumer, as well as the largest contributor to global growth in gas demand. China's emissions also come from its industrial processes, such as paper and steel production, and from the burning of fossil fuels for power generation and transportation.
While China's emissions had been increasing, they experienced a temporary reduction during the initial phase of the COVID-19 outbreak in 2019-2020 due to a slowdown in manufacturing, construction, transportation, and overall economic activity. China has also been developing renewable energy sources, and in 2023, it committed to ramping up renewable energy and reducing greenhouse gas emissions. China has set targets to peak emissions by 2030 and achieve carbon neutrality by 2060.
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India's rising pollution
India is one of the world's most polluted countries, with New Delhi being the most polluted capital city globally. India emits about 3 gigatonnes of CO2eq of greenhouse gases each year, contributing to 7% of global emissions, despite having 17% of the world's population. The country's per capita emissions are low, but India is the third-largest producer of greenhouse gases, after China and the United States.
There are several reasons for India's rising pollution levels. Firstly, industrial and vehicular emissions are major contributors, with 51% of India's air pollution stemming from industrial activities and 27% from vehicles. Thermal power plants, in particular, play a significant role in polluting the air. Secondly, construction dust and debris significantly impact air quality, especially in urban areas. Thirdly, India's agricultural practices contribute to pollution, with large-scale crop residue burning in autumn and spring months, serving as a cheaper alternative to mechanical tilling. This burning of crop residues is a major source of smoke, smog, and particulate pollution. Additionally, waste burning and the use of wood and dung for cooking and heating, especially in rural areas, further exacerbate the problem.
The effects of India's rising pollution are devastating, with severe consequences for the health and environment of the country. According to the State of Global Air 2024 report, air pollution accounts for more than 2 million deaths annually in India. It is the fifth-largest killer in the country, leading to respiratory and cardiovascular diseases, including asthma, bronchitis, COPD, and lung cancer. The frequency and intensity of heatwaves in India are also increasing due to climate change, with temperatures rising by 0.7 °C between 1901 and 2018. This rise in temperature is causing Himalayan glaciers to retreat, threatening the flow rate of major rivers like the Ganges and Brahmaputra.
To address the issue of rising pollution, the Indian government has taken several steps. In 2019, India launched the National Clean Air Programme, aiming to reduce particulate matter pollution by 30% by 2024, with a revised target of 40% by 2026. The government is working with various organizations to improve air quality data, monitoring, and source apportionment. Additionally, the Confederation of Indian Industry has developed a Corporate Air Emissions Reporting Guide to assist businesses in managing and reporting their air emissions. India's CEO Forum for Clean Air is also growing, with over 130 members from the private sector committed to finding solutions for poor air quality.
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US climate policies
The US is one of the world's worst polluters, alongside China, India, and the EU. The US has been taking steps to reduce its emissions and combat climate change through various policies and initiatives.
One of the key US climate policies is the Inflation Reduction Act (IRA), signed into law by President Joe Biden in 2022. The IRA is the largest climate investment in the country's history and includes provisions for clean energy investments, tax credits for renewable projects, and initiatives to accelerate the transition to a low-carbon economy. The Act also includes funding for nature-based solutions, such as ecosystem restoration and wildfire risk reduction, and supports the uptake of climate-smart agricultural practices.
The US Environmental Protection Agency (EPA) has also played a crucial role in addressing climate change. The EPA has implemented CO2 emission standards for commercial aviation and large business jets and is responsible for the Renewable Fuels Standard Program, which promotes the use of renewable fuels in transportation. The EPA's Clean Air Act requirements for the oil and natural gas industry help reduce emissions and combat climate change. Additionally, the EPA is taking action to address major sources of climate and health-harming pollution, including the transportation, oil and natural gas, and power sectors.
The US has also committed to reducing greenhouse gas emissions and increasing the use of electric vehicles. The Biden-Harris Administration aims to achieve a net-zero emissions economy by 2050, with targets to cut overall US greenhouse gas emissions by 61-66% by 2035 relative to 2005 levels and reach 50% electric vehicle sales by 2030. The US has also rejoined the Paris Agreement and ratified the Kigali Amendment to the Montreal Protocol, demonstrating its commitment to global cooperation on climate action.
While the US has made progress under the Biden Administration, additional efforts are needed to meet its climate targets. This includes addressing the increasing demand for electricity across sectors and reducing fossil fuel extraction and exportation. The US also needs to provide more financial support to other countries and address emissions from animal production and dietary changes.
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EU's climate action
The biggest polluters need to take action to reduce their carbon emissions and offset their carbon footprint. China, the United States, India, the EU, Russia, and Brazil were the world's largest greenhouse gas emitters in 2023. China has been the largest emitter of CO2 since 2006, driven by its extensive use of coal. However, when considering per capita emissions, the average American is responsible for nearly twice as much climate pollution as the average person in China.
The EU is taking climate action through the Directorate-General for Climate Action (DG CLIMA), which leads the European Commission's efforts to combat climate change and transform the EU into a climate-neutral and resilient society. DG CLIMA develops and implements policies and legislation to help the EU achieve its climate targets, including net-zero greenhouse gas emissions by 2050. The EU has also introduced the Carbon Border Adjustment Mechanism (CBAM) to address carbon leakage concerns, where industries move operations to regions with less stringent emission regulations.
Additionally, the EU is working with partners worldwide to encourage and support climate action in other countries and regions. CAN Europe, a leading NGO coalition, is part of this effort, promoting sustainable climate and energy policies throughout Europe and its neighboring countries. They aim to reach the 1.5-degree goal of the Paris Agreement through emissions trading, industrial decarbonization, and advocating for 100% renewables and a fossil fuel phase-out.
While the EU and the US have historically been top polluters, their levels of planet-heating pollution have been declining in recent years as they strengthen their climate policies. In 2022, US President Joe Biden signed the Inflation Reduction Act, the country's largest-ever climate investment. The EU has also set ambitious plans to reduce emissions and promote clean growth for its economy. These efforts are crucial in addressing the urgent climate crisis and ensuring a fair transition for all.
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Fossil fuels
Several countries have been identified as major polluters due to their extensive use of fossil fuels. China, the United States, India, Russia, Brazil, and the European Union are among the top emitters of greenhouse gases. China has been the largest emitter of CO2 for several years, with its emissions driven by the extensive use of coal to fuel its economic growth. However, China has also been developing renewable energy sources, and its emissions are projected to peak by 2025.
The United States has historically released the most CO2 emissions since 1850 and is responsible for the largest share of historical emissions. While its emissions have been declining in recent years, the average American is responsible for nearly twice as much climate pollution as the average person in China. The US has also developed long-term plans to decarbonize its economy, along with other countries such as Japan, Canada, Germany, and Mexico.
India, another major emitter, has seen a significant increase in its emissions in recent years. While its per capita emissions are below the global average due to its large population, India is one of the world's biggest climate polluters. Russia and Brazil have also increased their emissions in recent years and are among the top 10 largest historical emitters.
In addition to these countries, Nigeria is also a significant producer and exporter of fossil fuels. While it has much lower historical responsibility for the climate crisis, Nigeria still has an important role in addressing its emissions and contributing to global efforts to reduce pollution.
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Frequently asked questions
China has been the largest emitter of CO2 since 2006, with emissions of over 14 billion tons in 2023.
The United States is the second-largest emitter of CO2, with emissions of 4.4 billion tons in 2022.
India is the third-largest emitter of CO2, with emissions of 2.3 billion tons in 2022.
Population size, industrial activity, and the use of fossil fuels are key factors in a country's pollution levels.
Germany, Russia, Brazil, and countries in the European Union are also among the top polluters globally.
