Brian Barton
The world's worst polluters are responsible for the vast majority of global emissions, with the top 20 global climate polluters accounting for 83% of emissions in 2022. The countries that emit the most carbon dioxide are China, the United States, and India. 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 India's per capita emissions are significantly below the global average. China's emissions are largely due to its extensive use of coal and its position as the world's largest exporter of consumer goods. The United States and European Union's emissions are attributed to their industrial revolution periods and heavy reliance on fossil fuels. To avoid the worst impacts of climate change, a rapid reduction in emissions is necessary, with the goal of reaching net zero by 2050.
| Characteristics | Values |
|---|---|
| Worst polluting countries | China, the United States, India, the EU27, Russia and Brazil |
| Cause of emissions | Burning of fossil fuels, generation of energy through non-renewable channels, and polluting human activities |
| Worst polluting companies | Saudi Aramco, Exxon Shipping Company |
| Cause of emissions | Extraction and subsequent emissions |
| Climate change impact | Global warming, rising sea levels, and extreme weather events |
| Solutions | Carbon Border Adjustment Mechanism (CBAM) in Europe, Inflation Act in the USA, and individual efforts to reduce carbon impact |
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What You'll Learn
- China: largest CO2 emissions, driven by extensive coal use
- US: heavy reliance on fossil fuels, largest per capita emissions
- India: significant fossil fuel burning, 14/15 most contaminated cities
- Saudi Aramco: leading state-owned polluter, 4.38% of global emissions
- Exxon Shipping Company: caused one of the worst oil spills in history
China: largest CO2 emissions, driven by extensive coal use
China is the world's largest emitter of carbon dioxide, with its emissions in 2023 amounting to 12.6 gigatonnes of CO2eq, or 35% of the world total. China's high carbon emissions are driven by its extensive use of coal, which is used to power its heavy industries, including manufacturing, agriculture, mining, and construction. These sectors collectively made up 62.5% of China's energy use and 49% of its coal use in 2017. Notably, this figure does not include power production activities, which were responsible for 46.5% of coal consumption.
China's economic growth has been primarily powered by coal, which constituted an average of 69.9% of the country's energy consumption between 1985 and 2016. While nationwide coal usage has slowed down since 2008, China still consumed more coal than the rest of the world combined in 2018. From 2008 to 2018, China's coal consumption maintained around 1854.5 million tonnes of oil, with coal representing 59% of the country's total energy use in 2018.
China's industrial sector is the primary consumer of coal, and the country's extraordinary urbanization boom has intensified construction-related activities, which are among the main sources of carbon dioxide emissions. China is also the world's largest producer of steel, and steel production is a coal and coke-intensive process, with each ton of steel producing two tons of carbon dioxide. Cement production, another major industry in China, also releases significant amounts of CO2, with 1.25 tons of CO2 emitted per ton of cement created.
China has recognized the need to reduce its carbon emissions and has implemented policies to constrain coal consumption and transition to renewable energy sources. For example, China has set a goal of increasing the share of non-fossil fuels in primary energy consumption to around 25% by 2030. However, China continues to build coal-fired power stations and invest in coal-based steelmaking, which may hinder its progress toward its carbon neutrality targets.
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US: heavy reliance on fossil fuels, largest per capita emissions
The United States' heavy reliance on fossil fuels and its position as the country with the largest per capita emissions are significant contributors to its status as one of the worst polluters globally.
The US relies heavily on fossil fuels to meet its energy needs, with fossil fuels projected to account for 66% of the country's energy use in 2050. This is despite the availability of renewable energy sources, such as wind and solar power, which are cleaner and more sustainable alternatives. The country's transportation system, for instance, is heavily dependent on conventional petroleum oil, contributing to 20% of its climate change pollution. Additionally, the US is a major importer of dirty fuels, such as tar sands, which have devastating environmental consequences, including the destruction of ecosystems and the contamination of freshwater sources.
In 2022, the US emitted 6,343 million metric tons of carbon dioxide equivalents, with a significant portion of these emissions coming from the burning of fossil fuels. The country's greenhouse gas emissions have shown a downward trend since 2007, with a 3% decrease in emissions compared to 1990 levels. However, the transportation sector has been the largest contributor to emissions since 2017, accounting for 28.4% of emissions in 2022. Electric power generation is the second-largest contributor, responsible for approximately 25% of emissions.
The US has taken some initiatives to reduce its reliance on fossil fuels and promote renewable energy sources. For example, the federal production tax credit (PTC) and the energy investment tax credit (ITC) have spurred the growth of renewable energy. Additionally, the US has joined 132 other countries in pledging to triple the world's installed renewable energy generation capacity to 11,000 GW by 2030. However, the country still provides billions of dollars in subsidies to fossil fuel companies, hindering the transition to a clean energy system.
The US has experienced environmental disasters due to its heavy reliance on fossil fuels. One notable incident is the Exxon Valdez oil spill in 1989, where an Exxon Shipping Company tanker struck a reef off the Alaska coast, spilling about 37,000 tonnes of oil and polluting over 1,000 miles of coastline.
In conclusion, the US's high per capita emissions and heavy reliance on fossil fuels make it a significant contributor to global pollution. While there have been some efforts to transition to renewable energy sources, the country continues to face challenges in reducing its dependence on fossil fuels and mitigating the environmental consequences associated with their extraction, production, and use.
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India: significant fossil fuel burning, 14/15 most contaminated cities
India has been described as the most polluted country in the world. The country has 14 of the 15 most contaminated cities globally in terms of PM2.5 concentrations. Delhi, the capital, has been described as the most polluted city in the world. In 2016, the city and its adjoining areas were covered in a thick blanket of smog, the worst in 17 years.
India's pollution problem is caused by a variety of factors, including industrial and vehicular emissions, construction dust and debris, dependence on thermal power for electricity, waste burning, and the use of wood and dung for cooking and heating. According to one source, 51% of India's air pollution is caused by industrial pollution, 27% by vehicles, 17% by crop burning, and 5% by other sources. Another source attributes the pollution to the burning of fossil fuels, which has grown significantly in recent years.
The health consequences of India's poor air quality are severe. Air pollution contributes to the premature deaths of about 2 million Indians every year. A Lancet study estimated that in 2019, worsening air pollution caused nearly 1.67 million deaths and an estimated loss of US$28.8 billion worth of output. A chest surgeon at New Delhi's Sir Ganga Ram Hospital, Dr Arvind Kumar, has observed a dramatic shift in the profiles of lung cancer patients, with half of them being non-smokers and about 40% being women. Dr Kumar has also seen black deposits in the lungs of teenagers, which would have been unthinkable 30 years ago. Chronic obstructive pulmonary disease has become India's largest cause of death after heart disease.
Despite the dire situation, India's environment minister, Harsh Vardhan, has downplayed the health consequences of air pollution, arguing that it mainly affects those with pre-existing lung conditions. However, international studies have shown that air pollution has a wide range of negative impacts on overall health. In response to the pollution crisis, India launched the National Clean Air Programme in 2019, aiming to reduce PM2.5 and PM10 concentrations by 20%-30% by 2024.
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Saudi Aramco: leading state-owned polluter, 4.38% of global emissions
Saudi Aramco, a Saudi Arabian state-owned company, is the world's leading polluter. In 2023, the company produced 1.839 metric tons of carbon dioxide equivalent (MtCO2e), accounting for 4.38% of global CO2 emissions. If Aramco was a country, it would be the fourth-largest polluter in the world, after China, the US, and India.
Aramco's majority owner is the Saudi Arabian government, which has a long history of fighting efforts to tackle climate change. Despite this, the company has committed to pledges that will allow it to increase its emissions overall and only reduce the carbon intensity of its business by 13%. Aramco's 2020 Annual Report sets out a 7-point business strategy, which includes maintaining its position as the world's largest crude oil company by production volume and expanding its gas activities. The company does not disclose the emissions produced by its fossil fuel products (Scope 3 emissions), which are estimated to account for over 4% of the entire world's GHG emissions since 1965.
Aramco's activities have significant environmental implications. The burning of fossil fuels, including oil, is the single-largest source of global greenhouse gas (GHG) emissions, which are the primary drivers of global warming. GHGs, such as carbon dioxide, trap heat in the atmosphere, leading to higher temperatures and varying effects on the climate. For example, dry regions may become drier, while the ice caps at the poles melt, causing higher sea levels. The situation is critical, and urgent action is needed to reduce emissions and mitigate the pressure on the planet.
To address the climate crisis, there is a growing focus on the power structures and financial and lobbying systems that enable fossil fuel companies to continue growing. By shifting the debate from individual responsibilities, efforts can be directed towards holding these companies accountable for their contributions to climate change and influencing political decisions. This includes utilizing databases like the Carbon Majors Database to track emissions, establish liability, and inform legal and regulatory actions against fossil fuel companies and leaders.
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Exxon Shipping Company: caused one of the worst oil spills in history
The Exxon Shipping Company caused one of the worst oil spills in history. On March 24, 1989, the Exxon Valdez oil tanker struck Bligh Reef in Alaska's Prince William Sound, spilling around 11 million gallons of crude oil into the water.
The Exxon Valdez was sailing outside the normal sea lane to avoid icebergs when it struck the reef. The impact tore open the ship's hull, resulting in a massive oil spill. Initial attempts to contain the oil failed, and the slick spread, eventually covering about 1,300 miles of coastline. The disaster had devastating consequences for the environment, killing hundreds of thousands of seabirds, otters, seals, and whales. The fishing industry in the area collapsed, and even years later, the shoreline has yet to recover entirely.
Several factors contributed to the accident. Firstly, the ship's captain, Joseph Hazelwood, was not at the helm when the accident occurred. Hazelwood had altered the vessel's course to avoid icebergs and handed control to an unlicensed third mate, who was sleep-deprived and not professionally qualified to steer the ship. Additionally, the ship's radar had not been functioning for over a year, and Exxon had failed to install state-of-the-art iceberg monitoring equipment.
Following the disaster, Exxon faced significant backlash and financial repercussions. The company spent over $3.8 billion on cleanup costs and compensated those affected by the spill. The United States Congress also passed the Oil Pollution Act of 1990 (OPA), which increased penalties for companies responsible for oil spills and mandated the use of double-hull tankers. Exxon argued that the Coast Guard shared responsibility for the spill and sought reimbursement for cleanup costs. However, the company's claims were largely unsuccessful, and Exxon's reputation was severely damaged by the incident.
The Exxon Valdez oil spill is a stark reminder of the devastating consequences of human error and corporate negligence in the environmental context. It led to increased scrutiny of oil spill prevention rules and regulations and highlighted the need for stricter accountability for companies operating in ecologically sensitive areas.
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Frequently asked questions
The worst polluters are China, the United States, India, the EU, Russia, and Brazil. China is the largest polluter in the world, driven by its extensive use of coal. The US has the highest emissions per capita, and India has the highest number of polluted cities.
The leading state-owned polluter is Saudi Aramco, which has produced 4.38% of global carbon emissions since 1965. Twelve of the top 20 polluting companies are state-owned and are responsible for 20% of total emissions.
Greenhouse gases, primarily carbon dioxide, trap heat in the atmosphere, leading to global warming. This results in rising temperatures, melting ice caps, and higher sea levels. The effects of climate change are devastating, and it is urgent that emissions are reduced.
Individuals can reduce their carbon impact by switching to greener travel options, such as trains and electric cars, and by buying locally produced goods. Governments can implement legislative measures such as the Carbon Border Adjustment Mechanism (CBAM) in Europe and the Inflation Act in the US to encourage sustainable practices and control global emissions.
Some of the worst environmental disasters caused by humans include the Exxon Valdez oil spill in 1989, which spilled 37,000 tonnes of oil into the sea, and the Iranian tanker Sanchi collision in 2018, which resulted in three oil slicks spreading over 332 sq km.
