Meghan Hodges
Each year, more than 50 billion metric tons of CO2 are released into the Earth's atmosphere, causing global warming and climate change. While there are different ways of ranking the most polluting countries, the three countries with the highest carbon dioxide (CO2) emissions are China, the United States, and India. These three countries contribute 42.6% of total emissions, with China leading due to 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, and the densely populated India falls significantly below the global average.
| Characteristics | Values |
|---|---|
| Country with the most pollutants each year | China |
| Second-highest emitter | United States |
| Third-highest emitter | India |
| China's emissions driven by | Extensive use of coal |
| US and EU emissions driven by | Industrial revolution periods and heavy reliance on fossil fuels |
| US per capita emissions | Nearly twice as much climate pollution as the average person in China |
| India's rank in per capita emissions | Significantly below the global average |
| US, EU, Russia, and Japan | Have peaked their per capita emissions |
| Global emissions in 2020 | 32 billion tonnes of CO2 |
| Global emissions in 1990 | 20 billion tonnes |
| Global emissions in 1950 | 6 billion tonnes |
| Global emissions in 2021 | 0.1% increase over 2019 values |
| Global emissions in 2019 | 35 billion tonnes |
| Global emissions in 2020 due to COVID-19 | Decreased by 4.9% |
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What You'll Learn
China's extensive use of coal
China is the world's largest producer and consumer of coal and coal power. In 2023, China produced 4.71 billion tons of coal, accounting for over half of the global production. China's coal production has only increased in 2024, with the country producing approximately 4.8 billion tons of coal per year.
The extensive use of coal in China can be traced back to ancient times. Historians suspect that Chinese people were involved in the surface mining of coal around 3490 BC, with the Fushan mine starting around 1000 BC, marking the earliest coal mine in the ancient world. In the 6th century, there are descriptions of coal being used for household purposes, such as cooking, with coal being the main option for households in the capital, Kaifeng, by the 11th century. By the 12th century, twenty new coal markets were established, and coal replaced charcoal in the zone.
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. In 2019, coal generated by China produced 7.24 billion tons of CO2, about 14% of global emissions. China's coal usage causes an estimated 750,000 premature deaths annually, with indoor coal use in rural areas causing severe health problems for millions.
Despite China's rapid development of renewable energy, the country has continued to approve and build new coal-fired power plants in recent years. In 2024, China began constructing 94.5 gigawatts (GW) of new coal-fired power capacity, the highest level of construction in the past 10 years. This expansion has been attributed to system-level dynamics, institutional incentives, and regional policy priorities. While China has pledged to limit the increase in coal consumption and reduce its use, the continued construction of new coal-fired power plants poses a challenge to these commitments.
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The US's industrial revolution
The US Industrial Revolution, which occurred in two distinct phases, was a pivotal period that transformed the country's economic structures, social dynamics, and technological landscape. The first phase, from 1790 to 1860, witnessed the introduction of British industrial methods to the US textile industry by Samuel Slater, who is often regarded as the "Father of the American Industrial Revolution". This phase also saw Eli Whitney's invention of the cotton gin and interchangeable parts, which revolutionized weapon assembly and repair. Additionally, the construction of the Erie Canal and the transportation revolution improved connectivity, leading to urbanization and an expanded labour force in cities like New York, Chicago, and Philadelphia.
The second phase, from 1860 to 1914, saw the emergence of new businesses mass-producing electric lights, telephones, pharmaceuticals, and automobiles. This period was epitomized by figures like Thomas Edison and Henry Ford, with Ford's assembly line further revolutionizing manufacturing processes. The Industrial Revolution fostered an increase in the quantity and diversity of consumer goods, reshaping the US from an agrarian society to an industrial powerhouse. However, it also led to unemployment, low wages, and the decline of small businesses employing artisans and craftsmen.
The US Industrial Revolution, with its heavy reliance on fossil fuels, has contributed significantly to the country's high levels of planet-heating pollution. Despite recent efforts to address climate change, such as the Inflation Reduction Act, the US still faces a long journey towards net zero emissions by 2050. The average American produces nearly twice as much climate pollution as the average person in China, the country with the highest overall emissions. This paradox underscores the complexity of global efforts to combat climate change and the need for continued commitment to ambitious climate policies.
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India's renewable energy investments
China, the United States, and India are the three countries with the highest carbon dioxide emissions. However, when it comes to per capita emissions, India is significantly below the global average. India has been making efforts to reduce its greenhouse gas emissions by investing in renewable energy sources.
India's renewable energy sector has attracted significant foreign investment, with around USD 21.33 billion in foreign direct investment (FDI) between April 2000 and December 2024. The country is expected to invest over USD 360 billion in renewable energy and infrastructure by 2030, with USD 16.5 billion projected for 2024, an 83% increase from previous years. India's clean energy investments are on an upward trajectory, with spending reaching USD 68 billion in 2023, a 40% increase from the 2016-2020 average.
India has set a target of reaching net-zero emissions by 2070 and has scaled up solar and wind power investments. The country has also announced measures to promote domestic clean energy supply chains, such as the Production Linked Incentives scheme for manufacturing solar modules and batteries. India's renewable energy capacity is growing rapidly, with a CAGR of 19.02% between FY16 and FY25, and it currently stands at 220.1 GW in FY25.
Several companies are investing in renewable energy projects in India, including:
- Hindustan Petroleum Corporation Ltd (HPCL), which plans to invest INR 50,000 Cr to build a 10 GW renewable energy portfolio by 2030
- Oil and Natural Gas Corporation Ltd (ONGC) and Tata Power Renewable, which have signed an agreement for battery energy storage systems
- Gensol Engineering, which secured a contract for a 245 MW solar project worth INR 967.98 Cr
- JSW Neo Energy, which signed a power purchase agreement with Amazon for 180 MW of wind power
- Avaada Group, which pledged INR 20,700 Cr for green projects in Odisha and signed an agreement with the Maharashtra government for pumped storage projects
- NTPC, which signed preliminary agreements to invest over USD 23.6 billion in renewable energy projects in Madhya Pradesh
- Larsen & Toubro, which aims to play a key role in India's target of 100 GW of nuclear energy by 2047
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EU's clean energy plans
China is the biggest emitter of pollutants each year, driven by its extensive use of coal. The US and EU are also significant contributors to pollution due to their historical emissions, industrial revolution periods, and heavy reliance on fossil fuels.
The EU's Clean Energy Plans
The EU has demonstrated its commitment to tackling climate change and reducing its environmental footprint through various initiatives and plans. Here are some key components of the EU's clean energy strategy:
Clean Industrial Deal and Affordable Energy Action Plan:
The Clean Industrial Deal and the accompanying Affordable Energy Action Plan are cornerstone strategies of the EU's clean energy agenda. The Clean Industrial Deal focuses on boosting industry and manufacturing sectors, while the Affordable Energy Action Plan aims to reduce electricity costs and increase energy efficiency. These plans will leverage over €100 billion (US$105 billion) to accelerate the transition to clean energy and support EU-made clean manufacturing initiatives. This includes strengthening the Innovation Fund and proposing an Industrial Decarbonisation Bank.
Electrification Action Plan and Heating and Cooling Strategy:
The Electrification Action Plan addresses the need to shift from fossil fuels to clean electricity. It aims to remove barriers and identify priority policy actions to expedite the electrification of the EU's energy consumption. The Heating and Cooling Strategy complements this by targeting the heating and cooling sector, which accounts for around half of the EU's energy consumption. The strategy will promote the deployment of clean heating and cooling solutions and encourage their use in buildings and industry.
Energy Efficiency Improvements:
The EU recognizes the importance of energy efficiency in reducing overall energy consumption. The Energy Efficiency Roadmap outlines 10 concrete areas for improvement, including sector-specific policies, financing, investment, and citizen awareness. The EU has committed to reducing its final energy consumption by 11.7% by 2030 compared to 2020 levels.
National Building Renovation Plans:
EU countries are required to develop National Building Renovation Plans, outlining strategies to achieve fully decarbonized building stock by 2050. This involves implementing the Energy Performance of Buildings Directive to improve energy performance and reduce energy bills.
Global Pledge on Renewables and Energy Efficiency:
The EU has committed to the Global Pledge, launched at COP28 in 2023, aiming to double the global rate of energy efficiency improvements and triple the global installed capacity of renewables by 2030.
The EU's clean energy plans demonstrate a comprehensive approach to tackling climate change, reducing emissions, and transitioning to a sustainable, decarbonized energy system. These initiatives aim to make Europe a global leader in clean energy manufacturing and consumption.
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Per capita emissions
When it comes to per capita emissions, or the average emissions per person in a country, the picture can look quite different from overall emissions. Per capita emissions are calculated by dividing a country's total emissions by its population.
While China is the biggest emitter of pollutants overall, the average American is responsible for nearly twice as much climate pollution as the average person in China. This is due in part to the US's historical emissions and its responsibility for them. The EU also has high per capita emissions for similar reasons, as well as its heavy reliance on fossil fuels.
In contrast, India, which is one of the world's biggest climate polluters, has per capita emissions that are significantly below the global average. This is due to its large population. Similarly, while Qatar, Kuwait, and Saudi Arabia are significant polluters, they do not appear in the ranking of the top 10 most polluting countries per capita due to their small populations.
The three countries with the highest per capita emissions are all located in the Arabian Peninsula. This is attributed to the large share of the oil industry in their economies and their small populations.
It is important to note that per capita emissions can be influenced by a variety of factors, including a country's historical emissions, its ability to pay for climate action, and the net import-export balance of CO2.
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Frequently asked questions
China, the United States, and India are the top three countries with the highest carbon dioxide (CO2) emissions. These three countries contribute 42.6% of total emissions.
The three countries with the highest per capita emissions are located on the Arabian Peninsula due to their large share of the oil industry and small populations. While India is the third-highest emitter in terms of total emissions, it does not rank as highly per capita.
There are different ways of ranking the most polluting countries, depending on the calculation method used: CO2 emissions, per capita, ecological footprint, etc. Per capita emissions are calculated by dividing a country's total emissions by its population.
The largest part of these emissions comes from the use of fossil fuels, the generation of energy through non-renewable channels, and polluting human activities.
