Fact check: Do 100 corporations produce 70% of all greenhouse gas emissions?

If you're on the climate doom side of the internet, you may have seen claims that blame 100 corporations for producing 70% of all the harmful emissions that are driving climate change, otherwise known as greenhouse gas emissions.

These social media users aren't the first — and they probably won't be the last — to place the majority of the climate change burden on 100 companies.

The original study did not include emissions from land use, land use change or forestry, or from sources such as landfills, agriculture and farming. It also did not include data on indirect emissions, which come from purchased energy such as heating and electricity, citing concerns about double-counting emissions attributable to corporations.

Richard Heede, the director of the Climate Accountability Institute and the study’s co-author, leads the Carbon Majors Database. It contains operational and product-related carbon dioxide and methane emissions related to 100 fossil fuel producers, aka the "carbon majors," which include ExxonMobil, Shell, BP, Chevron, Peabody and BHP Billiton.

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It’s difficult to discern how much total global emissions can be attributed to the top 100 polluting corporations, but there are ways to get a ballpark idea.

Heede said in an email to PolitiFact that his recent research — not yet published — indicates that the emissions the study considered (carbon dioxide and methane from fossil fuels and cement production) account for 70.4% of total human-made emissions from 1988-2018. That could mean that about half of total global emissions can be traced back to those 100 companies. But the timelines are not equal, and it's not peer-reviewed.

There are many ways to categorize where greenhouse gas emissions come from, such as by country, by economic sector or, in Heede's research, by corporation.

The Intergovernmental Panel on Climate Change is the United Nations body responsible for human-induced climate change data and the internationally trusted source for global emissions statistics. The panel divides total human-made greenhouse gas emissions into different economic sectors, including "industry." That's not to be confused with Heede's definition of "industrial greenhouse gases," which includes all fossil fuel use and cement process emissions.

Additionally, the 71% figure from the study that focused on 1988 to 2015 has become outdated. Heede said recent research from the Global Carbon Project now attributes 69.5% of global fossil fuel and cement emissions from 1751 to 2018 to the top 100 fossil-fuel producers.

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So, 100 corporations are not responsible for 71% of total global emissions. The study found that 71% of global fossil fuel and cement emissions can be attributed to 100 companies, and Heede was intentional with careful wording.

Heede also said direct emissions that come from company operations, such as extracting and refining the oil, typically account for around 12% of a "carbon major" company's total emissions. The other 88% comes from the consumption of the products.

For example, Chevron, the top emitter of U.S.-tied fossil fuel companies, directly emits harmful greenhouse gases when it explores new areas to drill oil or when it refines that oil into gasoline. But of the approximate 48,267 million tons of carbon dioxide equivalent Chevron emitted from 1965 to 2018, around 42,474 of it (or 88%) is estimated to come from the cars burning gasoline, the airplanes burning fuel, etc.

"I hold the companies accountable for producing and marketing harmful products and for deceptively perpetuating the carbon age for fun and profit," Heede said.

Climate activists have used the study to push for tighter emissions regulations and counter the argument of increased individual responsibility, like cutting out plastic straws or driving electric vehicles.

Heede is doubtful either of the climate activists' calls will be answered. Without regulations forcing corporations to produce less, there is little reason to believe consumers will reduce their consumption enough to dramatically slow climate change.

"It is unlikely that human behavior will change enough to avert serious climate damages," Heede said. "We love our stuff, we love to eat high on the food chain, we keep getting into wars over resources, we like the way we live: big houses, big cars, lots of material goods. Yet only a fraction of U.S. emissions are within our immediate control."

Retrofitting houses to be more energy- and carbon-efficient, driving an electric car and composting waste can help, Heede said, "but industry and commerce and landfills and transportation will still have a large carbon footprint."

An Instagram post claimed, "If every person on earth just recycled, stopped using plastic straws, and drove an electric car, 100 corporations would still produce 70% of total global emissions."

No, 100 corporations do not produce 70% of total global emissions. The 2017 study that is often cited found that 100 corporations could be attributed to 71% of fossil fuel and cement emissions. The difference between the two claims is in the denominator of the corporation emission equation: it's not all emissions, just industrial greenhouse gas emissions from 1988-2015.

Research that accurately compares the total global emissions to the data collected from the 100 most-polluting corporations worldwide does not exist yet.

The study tied emissions from consuming carbon major products to the companies that produced those products. So, in theory, everyone driving an electric car would create less demand for gasoline and decrease companies' emissions.

We rate this claim False.