Helena Joyce
Global warming is caused by human activity, specifically the emission of greenhouse gases. While China is the biggest emitter overall, the average American is responsible for nearly twice as much climate pollution per capita. The US has also emitted the largest share of historical emissions, with some data showing that by the end of 2021, the US will have emitted more than 509 GtCO2 since 1850. Other large polluters include India, the European Union, and countries in the Arabian Peninsula.
| Characteristics | Values |
|---|---|
| Biggest Polluter in 2022 | China |
| Biggest Polluter Overall | USA |
| Per Capita Emissions | Average American responsible for nearly twice as much climate pollution as the average Chinese person |
| Top 3 Polluters | China, USA, India |
| Top 20 Polluters' Share of Emissions | 83% |
| Global Temperature Increase Since Industrial Revolution | 1°C |
| Paris Climate Agreement Goal | Avoid a 2°C increase by the end of the century |
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What You'll Learn
China's extensive use of coal
The main consumers of coal in China include electricity generation, steel production, and rural households. In 2024, coal accounted for approximately 59% of China's electricity generation, with wind, solar, hydro, and nuclear contributing most of the remainder. While renewable energy sources are increasing, they are often treated as supplementary power sources, and coal remains a dominant force in China's energy landscape.
China's rapid industrialization has led to a growing demand for energy, and coal is a significant source of electricity generation. In recent years, there has been a "resurgence" in the construction of new coal-fired power plants in China, with 94.5GW of new coal-power capacity initiated in 2024, according to the Centre for Research on Energy and Clean Air (CREA) and Global Energy Monitor (GEM). This expansion is fuelled by investments from the coal-mining sector and poses a challenge to China's climate commitments.
However, it's important to note that China's consumption of oil and natural gas is also high, and the country is working towards reducing its reliance on imported fossil fuels. China's renewable energy capacity is rapidly increasing, with the country leading the world in installing solar and wind power. By 2030, China plans to double its current renewable energy capacity and has pledged to peak carbon emissions by 2030 and go carbon-neutral by 2060.
While China's extensive use of coal is a major contributor to global warming, the country is also making significant efforts to transition to cleaner energy sources and reduce its emissions.
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India's high emissions, low per capita
India is the third-largest carbon dioxide emitter globally, behind China and the United States. In 2023, India's per capita carbon dioxide emissions from fossil fuels reached 2.07 metric tons per person, a significant increase from 0.4 metric tons per person in 1970. Despite this increase, India's per capita emissions remain below the global average.
India's high emissions can be attributed to its reliance on coal, the most polluting of fossil fuels. The country's total carbon dioxide emissions from coal reached approximately two billion metric tons in 2023, a nearly sixfold increase from 1990 levels. The power sector, including coal-fired power plants, accounts for the largest share of India's greenhouse gas emissions, followed by agriculture. Together, these two sectors were responsible for over half of the country's total emissions in 2023.
India's economic development and industrialization have led to a higher demand for energy, particularly from carbon-intensive sources. Fossil fuel combustion in power plants for electricity generation and heat production contributes significantly to India's carbon dioxide emissions. Additionally, the country's transportation sector, heavily reliant on oil-based fuels, also plays a role in its high emissions.
While India's per capita emissions are relatively low compared to other countries, the overall impact of its total emissions is significant due to its large population. India's emissions data reflects the challenge of balancing economic growth with environmental sustainability, especially in developing countries.
To address the climate crisis, global efforts, such as the Conference of the Parties (COP) and legislative measures like the Inflation Act in the US, are striving to accelerate progress. India's participation in these initiatives demonstrates its commitment to reducing emissions and contributing to global sustainability. However, the urgency of the situation requires collective action from individuals, companies, and countries to achieve carbon neutrality and prevent further environmental degradation.
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US's largest share of historical emissions
While China was the biggest polluter in 2022, the US has been the largest polluter over time. The US has emitted more CO2 than any other country to date, with around 400 billion tonnes emitted since 1751. This accounts for 25% of historical emissions, which is twice that of China, the world's second-largest contributor.
The US has the highest per capita emissions of the top 10 CO2 emitters. The average American is responsible for nearly twice as much climate pollution as the average person in China. This is despite the fact that China's emissions are nearly 30% of global emissions.
The US has been responsible for the widespread use of coal, as well as the advent of the motor car, both of which have contributed to its high emissions. The US was the second-largest CO2 emitter in 1850, the first year of available data, and has remained one of the top two emitters throughout the 20th century.
The US and EU are significant contributors to pollution due to their industrial revolution periods and heavy reliance on fossil fuels.
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Germany's heavy dependence on coal
Germany is the European country with the highest CO2 emissions, largely due to its heavy dependence on coal. Germany is the largest energy consumer in the European Union and the world's largest producer of lignite. Coal-fired power generation is the single most important source of carbon dioxide emissions in Germany. Hard coal and lignite have a share of 35.3% in German power production, compared to 35.2% from renewables, 11.7% from nuclear, and 12.8% from natural gas in 2018. The energy sector is responsible for a large share of Germany's greenhouse gas emissions (37%). Germany is also one of the top 10 coal-burning countries in the world.
Germany's push to reduce the use of CO2-intensive lignite has faced opposition from critics who argue that the country should not abandon its only sizeable domestic energy source. Mining union IG BCE warned in 2015 that Germany should not play "Russian roulette" with its supply security and that domestic energy sources ensure German companies do not become more dependent on price and supply fluctuations in world markets. Germany's departure from coal also faces opposition from economic actors who have to bear the costs, such as utilities whose business models depend on coal and labor unions representing coal workers.
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Brazil's emissions from land use
Brazil, home to much of the Amazon rainforest, has the world's sixth-largest greenhouse gas emissions. Nearly half of these emissions are from land use. Brazil's emissions from land use primarily come from the forestry sector, with illegal and legal deforestation driven by cattle ranching, soy production for livestock feed, and logging for timber and charcoal.
Brazil's "Forest Code" law, first passed in 1965 and revised several times before being replaced in 2012, requires landowners to maintain a minimum percentage of their property under native vegetation, typically 80% in the Amazon region. However, this law has been challenging to enforce and monitor, and Brazil has struggled with deforestation for years.
Emissions from the land use, land-use change, and forestry (LULUCF) sector accounted for the majority of Brazil's greenhouse gas emissions for decades until 2005. While there was a significant decline of around 70% in the decade after 2005, LULUCF still accounts for about a fifth of Brazil's emissions.
Brazil has made pledges to address deforestation and reduce its greenhouse gas emissions from land use. For example, it has committed to achieving ""zero illegal deforestation" in the Amazon by 2030 and restoring 12 million hectares of deforested land by the same year. Additionally, Brazil launched a centralized database in 2020 to monitor individual trees through the supply chain to combat illegal logging in the Amazon.
Brazil's efforts to reduce emissions from land use are crucial in the global fight against climate change. As one of the top global polluters, along with countries like China, the United States, India, and those in the European Union, Brazil's actions have a significant impact on the rest of the world.
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Frequently asked questions
China was the largest climate polluter in 2022, making up nearly 30% of global emissions.
The United States is the second-biggest polluter and is responsible for the largest share of historical emissions, with some 20% of the global total.
India is the third-biggest polluter in terms of emissions, but when looking at per capita emissions, it ranks significantly lower than the other top 10 emitters.
Human activity is one of the main causes of global warming due to its very high greenhouse gas emissions.
Achieving carbon neutrality requires collective action, and carbon offsetting is a tangible solution to make an immediate impact.
