Bronte Wells
America has been called the biggest carbon polluter in history. The US is responsible for almost a third of the excess carbon dioxide that is heating the planet, and Americans burn fossil fuels at a higher rate per capita than the citizens of any other country. In 2023, about 66 million tons of pollution were emitted into the atmosphere in the United States. While China surpassed the US in total emissions a decade ago, much of this is due to manufacturing goods for the US and other rich countries.
| Characteristics | Values |
|---|---|
| Total emissions of the six principal air pollutants | Dropped by 78% from 1970 to 2023 |
| Population growth | 63% from 1970 to 2023 |
| Energy consumption growth | 42% from 1970 to 2023 |
| Vehicle miles traveled growth | 194% from 1970 to 2023 |
| Gross domestic product growth | 321% from 1970 to 2023 |
| Total pollution emitted into the atmosphere | 66 million tons in 2023 |
| US contribution to global plastic waste | 17% |
| US contribution to global population | 4% |
| US contribution to excess carbon dioxide | Almost a third |
| US contribution to global CO2 emissions | 13% in 2018 |
| US CO2 emissions from energy consumption | Increased by almost 20% from 1990 to 2005 |
| US CO2 emissions since 2005 | Decreased by more than 17% |
| US CO2 emissions in 2020 | Decreased by 11% |
| US CO2 emissions from 1750 to 2018 | 404.77 billion tons |
| US CO2 emissions from 1990 to 2022 | 3.0% decrease |
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What You'll Learn
The US is the biggest carbon polluter in history
The United States has contributed more than any other country to the atmospheric carbon dioxide that is heating the planet. In 2023, about 66 million tons of pollution were emitted into the atmosphere in the United States. These emissions contribute to the formation of ozone and particles, the deposition of acids, and visibility impairment. The typical American burns roughly twice as much fossil fuel as the average person in Europe or Japan, and 10 times as much as the average person in India.
While the United States is historically responsible for more emissions than any other country, it is no longer the world's largest emitter of greenhouse gases. China surpassed the United States over a decade ago and its emissions are about double the American figure. However, some of China's emissions are from the production of goods for the United States and other rich countries. The United States, with just over 4% of the world's population, is responsible for almost a third of the excess carbon dioxide in the atmosphere.
Greenhouse gas emissions in the United States primarily come from burning fossil fuels for energy and certain chemical reactions necessary to produce goods from raw materials. Industrial emissions are the third-largest source of direct emissions. If indirect emissions from electricity use are included, industrial activities account for a much larger share of U.S. greenhouse gas emissions. Commercial and residential sector emissions also increase substantially when indirect emissions from electricity use are included, largely because buildings use 75% of the electricity generated in the US.
The United States' decision to withdraw from the Paris Climate Deal in 2017 was a setback for efforts to address climate change. As the biggest carbon polluter in history, the United States has an obligation to take ambitious action to slow global warming.
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Fossil fuels are burned for energy
The United States has historically been the world's largest emitter of greenhouse gases, and while it is no longer the largest single emitter, it is responsible for almost a third of the excess carbon dioxide in the Earth's atmosphere. In 2022, fossil fuel combustion accounted for 74% of total US anthropogenic greenhouse gas emissions.
The burning of fossil fuels releases harmful pollutants, including benzene and formaldehyde, and drives global warming. Fossil fuels have a high carbon content, and when they are burned, oxygen combines with carbon to form CO2 and with hydrogen to form water. The amount of CO2 produced depends on the carbon content of the fuel. Coal is the most carbon-intensive fossil fuel, and oil and gas extraction processes also emit harmful pollutants.
The US has made progress in scaling up renewable energy and energy efficiency, and new regulations from the EPA aim to cut harmful emissions from power plants. However, in 2022, US greenhouse gas emissions increased by 0.2% compared to 2021 levels, driven by a rebound in economic activity after the COVID-19 pandemic.
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Commercial and residential emissions
In 2022, direct and indirect emissions from the commercial and residential sectors accounted for 31% of total US greenhouse gas emissions, a slight increase from 1990 levels. Direct emissions from these sectors made up 13% of the total. The largest contributor to direct emissions in the residential and commercial sectors is natural gas consumption, which accounted for 78% of direct fossil fuel CO2 emissions in 2022. Coal consumption is a minor component of energy use in these sectors.
The commercial and residential sector emissions increase substantially when indirect emissions from electricity end-use are included. This is because buildings use 75% of the electricity generated in the US, primarily for heating, ventilation, air conditioning, lighting, appliances, and plug loads. When emissions from electricity use are attributed to the commercial and residential sectors, these sectors account for a much larger share of US greenhouse gas emissions.
In 2024, residential sector emissions decreased due to reduced consumption of natural gas and petroleum products for space heating. However, emissions associated with residential electricity consumption increased by 1% due to higher electricity use for space cooling as temperatures rose. Commercial sector emissions remained relatively flat in 2024, with a minor decrease due to lower natural gas and petroleum consumption.
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Industrial emissions
The fashion industry, for instance, is responsible for an estimated 3-8% of global carbon emissions, with projections indicating a possible increase to 25% by 2050 if current trends persist. The industry's carbon footprint is expected to rise by 50% by 2030, according to the Apparel Impact Institute. Fast fashion, in particular, has emerged as a significant, often overlooked contributor to global pollution and environmental degradation.
Power plants are the single largest source of US carbon dioxide emissions, and coal is the biggest culprit. Coal supplies nearly half of America's electricity and is the dirtiest of all fuels, with the highest carbon content per unit of energy. Older power plants tend to be dirtier, with plants built before 1980 producing 73% of US carbon dioxide emissions from power plants.
The US has released more heat-trapping gases than China or India, the world's two most populous countries. As of 2021, the US had exceeded its carbon budget by about 346 billion metric tons. However, it is worth noting that China's annual emissions have been the highest globally since the mid-2000s.
The Environmental Protection Agency (EPA) plays a crucial role in monitoring and regulating industrial emissions. The EPA estimates emissions of ambient air pollutants and their precursors, considering factors such as industrial activity levels, technological developments, fuel consumption, and vehicle miles travelled. The EPA has implemented regulations and programs to improve air quality, leading to significant reductions in air emissions and associated health, longevity, and quality of life benefits for Americans.
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US population and carbon budgets
The United States is the highest emitter of fossil fuel emissions in North America, with a large economy and population that contribute to high energy demands and carbon emissions. The US population grew by 63% between 1970 and 2023, and during this period, total emissions of the six principal air pollutants dropped by 78%. However, in 2023, about 66 million tons of pollution were emitted into the atmosphere in the US, contributing to the formation of ozone and particles, the deposition of acids, and visibility impairment.
The US has also been a major contributor to global carbon emissions since the Industrial Revolution, which began in the mid-eighteenth century. Waves of European settlers cleared forests for farmland, boosting carbon emissions throughout the nineteenth century. By the mid-nineteenth century, global carbon emissions began to rise measurably, and the US remained one of the top emitters through 2021.
The US has signed the 2015 Paris Agreement, which aims to limit the increase in global average temperature to well below 2°C above pre-industrial levels. To meet these goals, nations must adhere to a carbon budget, which is a concept used in climate change politics to set greenhouse gas emissions reduction targets fairly and effectively. A carbon budget examines the "maximum amount of cumulative net global anthropogenic carbon dioxide (CO2) emissions that would result in limiting global warming to a given level."
The US has overspent its carbon budget by roughly 346 billion metric tons, according to Scientific American. This is due in part to the country's large population, which has a higher per-person emission rate than China and India, despite these countries having a much larger population. The US has also been burning coal, oil, and natural gas for far longer than China, and today the country, with just over 4% of the world's population, is responsible for almost a third of the excess carbon dioxide in the atmosphere.
To address these issues, scientists have attempted to allocate global carbon budgets among countries using various principles of equity. One common principle is the \"egalitarian\" principle, which suggests that emissions budgets should be distributed proportionally according to state populations. This may be favoured by countries with larger or rapidly growing populations, but it raises questions about whether individuals have a right to pollute. Another principle is the \"sovereignty\" principle, which highlights the equal right of nations to pollute and has been used in international regimes such as the Kyoto Protocol.
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Frequently asked questions
America has historically been the biggest carbon polluter and is responsible for almost a third of the excess carbon dioxide in the planet's atmosphere.
The primary sources of pollution in America are the burning of fossil fuels, industrial activities, commercial and residential activities, agriculture, and land use.
While America has been the largest emitter of greenhouse gases in the past, China surpassed them over a decade ago and now has double the amount of emissions. However, America's large population and high per-capita emissions mean they have a greater share of responsibility for addressing climate change.
America's emissions contribute to global warming, the formation of ozone and particles, the deposition of acids, and visibility impairment.
Despite being a signatory to the Paris Climate Agreement, America, under the Trump administration, withdrew from the accord and abandoned emissions targets. However, there are ongoing discussions and initiatives to combat climate change, with varying levels of success.
