20 Companies Responsible For the Most Carbon Emissions?
Since 1965, it’s estimated over 1.35 trillion metric tons of greenhouse gases have been released into the atmosphere—and over a third can be traced back to just 20 companies.
This week’s chart draws on a dataset from the Climate Accountability Institute, and highlights the companies which have been responsible for the most carbon emissions in the past half-century.
Note: Carbon emissions are measured in MtCO₂e: Megatonnes of CO₂ equivalent (Millions).
The Sum of their Carbon Emissions
Between 1965-2017, the top 20 companies have contributed 480,169 MtCO₂e in total carbon emissions, or 35% of cumulative global emissions. This whopping amount is mostly from the combustion of their products—each company on this chart deals in fossil fuels.
The largest contributor? Saudi Aramco, the national petroleum and natural gas company of Saudi Arabia. Saudi Aramco actually comes in first on another list as well—it’s the most profitable company, making over $304 million daily.
However, this financial gain came at a significant cost: the state-owned giant’s operations have resulted in 59,262 MtCO₂e in carbon emissions since 1965. To put that into perspective, this total is more than six times China’s emissions in 2017 alone (9,838 MtCO₂e).
Explore the full list of companies by location, who owns them, and their total 1965–2017 emissions count below:
|Company||Country||Ownership||All Emissions, MtCO₂e|
|Saudi Aramco||🇸🇦 Saudi Arabia||State-owned||59,262|
|Exxon Mobil||🇺🇸 U.S.||Investor-owned||41,904|
|National Iranian Oil Co.||🇮🇷 Iran||State-owned||35,658|
|Royal Dutch Shell||🇳🇱 Netherlands||Investor-owned||31,948|
|Coal India||🇮🇳 India||State-owned||23,124|
|Petroleus de Venezuela||🇻🇪 Venezuela||State-owned||15,745|
|Peabody Energy||🇺🇸 U.S.||Investor-owned||15,385|
|Abu Dhabi National Oil Co.||🇦🇪 UAE||State-owned||13,840|
|Kuwait Petroleum Corp.||🇰🇼 Kuwait||State-owned||13,479|
|Iraq National Oil Co.||🇮🇶 Iraq||State-owned||12,596|
|Total SA||🇫🇷 France||Investor-owned||12,352|
|BHP Billiton||🇦🇺 Australia||Investor-owned||9,802|
|Total Emissions||480,169 MtCO₂e|
A Greener Business Model?
According to the researchers, all the companies that show up in today’s chart bear some responsibility for knowingly accelerating the climate crisis even after proven scientific evidence.
In fact, U.S.-based Exxon Mobil is currently on trial for misleading investors: the company downplayed the effect of climate change on its profitability, while internal calculations proved to be much larger. It also sowed public doubt on the immense impacts of rising greenhouse gas levels on the planet.
Growing sustainability and environmental concerns threaten the viability of old business models for these corporations, causing many to pivot away from the fossil fuel focus. Take BP for example—originally named British Petroleum, the company embraced “Beyond Petroleum” as its new rallying cry. More recently, it launched a carbon footprint calculator and is committed to keeping its carbon emissions flat into 2025.
The first step to reducing your emissions is to know where you stand. Find out your #carbonfootprint with our new calculator & share your pledge today!— BP (@BP_plc) October 22, 2019
However, the Climate Accountability Institute argues that more can still be done, with the researchers calling for these companies to reduce their fossil fuel production in the near future.
Continued pressure on these “Big Oil” companies to peak their carbon emissions, and urgently increase their renewable energy investment, may help curb the climate crisis before it’s too late.
Correction: A previous version of this article mistakenly reported the total cumulative value of carbon emissions in millions instead of trillions. Both the article and graphic have been updated to reflect the changes accurately.
Charted: The Safest and Deadliest Energy Sources
What are the safest energy sources? This graphic shows both GHG emissions and accidental deaths caused by different energy sources.
Charted: The Safest and Deadliest Energy Sources
Recent conversations about climate change, emissions, and health have put a spotlight on the world’s energy sources.
As of 2021, nearly 90% of global CO₂ emissions came from fossil fuels. But energy production doesn’t just lead to carbon emissions, it can also cause accidents and air pollution that has a significant toll on human life.
This graphic by Ruben Mathisen uses data from Our World in Data to help visualize exactly how safe or deadly these energy sources are.
Fossil Fuels are the Highest Emitters
All energy sources today produce greenhouse gases either directly or indirectly. However, the top three GHG-emitting energy sources are all fossil fuels.
|Energy||GHG Emissions (CO₂e/gigawatt-hour)|
|Natural Gas||490 tonnes|
Coal produces 820 tonnes of CO₂ equivalent (CO₂e) per gigawatt-hour. Not far behind is oil, which produces 720 tonnes CO₂e per gigawatt-hour. Meanwhile, natural gas produces 490 tonnes of CO₂e per gigawatt-hour.
These three sources contribute to over 60% of the world’s energy production.
Generating energy at a massive scale can have other side effects, like air pollution or accidents that take human lives.
|Energy Sources||Death rate (deaths/terawatt-hour)|
According to Our World in Data, air pollution and accidents from mining and burning coal fuels account for around 25 deaths per terawatt-hour of electricity—roughly the amount consumed by about 150,000 EU citizens in one year. The same measurement sees oil responsible for 18 annual deaths, and natural gas causing three annual deaths.
Meanwhile, hydropower, which is the most widely used renewable energy source, causes one annual death per 150,000 people. The safest energy sources by far are wind, solar, and nuclear energy at fewer than 0.1 annual deaths per terawatt-hour.
Nuclear energy, because of the sheer volume of electricity generated and low amount of associated deaths, is one of the world’s safest energy sources, despite common perceptions.
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