ExxonMobil predicted global warming 40 years ago

He had all the cards in his hand. Back in the 1980s, oil giant ExxonMobil had highly accurate predictions from its scientists about global warming, and that turned out to be exactly what happened decades later, according to a new study published Thursday. Despite this, the company has been openly skeptical of the state of scientific knowledge on this topic for years, as this study published in a prestigious journal points out. Science.

ExxonMobil, one of the world’s largest oil companies, “modeled and predicted global warming with extraordinary accuracy, but spent decades denying the same climate science,” he said. Co-author of this work is Supran. For several years now, ExxonMobil has been accused of bickering about climate change caused by large amounts of greenhouse gases released by humans into the atmosphere, particularly the burning of coal or oil for energy production.

Tables are never parsed

Even in the United States, several lawsuits have been initiated against the company, some of which are still ongoing. Hearings were held in the European Parliament and the US Congress. But this is the first time that the predictions made by the team’s scientists have been systematically analyzed and compared with the predictions of other researchers at the time, as well as with actual observed warming since then.

The starting point is documents – public archives and scientific publications – discovered by Inside Climate News and journalists from the USA in 2015. Los Angeles Times, indicating that the company has long known that climate change is real and caused by human activity. In 2017, the first scientific study, published Thursday by the same researchers, expanded on this journalistic investigation by analyzing precisely the language the company used, first in these documents and then publicly. “But while in the past we’d paid attention to the language and rhetoric in these documents, we suddenly realized (…) there were all these graphs and charts that no one was bending over,” Geoffrey Supran explained.

Consistent Predictions

“This question has come up several times in recent years,” a company spokesman told AFP.

In total, the researchers analyzed 32 internal documents produced by ExxonMobil scientists between 1977 and 2002 and 72 scientific publications co-authored between 1982 and 2014. These documents contain 16 temperature forecasts. “Ten of them were consistent with subsequent observations,” the study notes. Two of the other six predicted greater warming. On average, they predicted a warming of about 0.2°C per decade, which is indeed in line with the current pace. And the predictions made by other researchers at that time were more or less similar.

“They knew enough to take action and alert the public.”

ExxonMobil “knew nothing about climate change decades ago,” says Geoffrey Supran, now a professor at the University of Miami but who conducted the work at Harvard. “They knew as much as independent and government scientists and probably enough to take action and warn the public. Yet the group’s executives have done the exact opposite, insists the study, which quotes former ExxonMobil CEO Lee Raymond as saying in 2000: “We don’t have enough scientific understanding of climate change to make reasonable predictions. »

In 2013, then-CEO Rex Tillerson said there were “uncertainties” around the “fundamental drivers of climate change.” Some of the company’s researchers have testified before the US Congress. One of them, Martin Hoffert, who was questioned by Democrat Alexandria Ocasio-Cortez in 2019 and emphasized how accurate his predictions were, simply replied: “We were great scientists. »

On Thursday, the World Meteorological Organization confirmed that it was the hottest year in the last eight years. During a press conference on this annual temperature report (when the study was not mentioned), NASA climatologist Gavin Schmidt speculated that the “exposing and shaming” of individual companies “doesn’t do much” to find adequate solutions without fossil fuels. . “It’s not like we can say, ‘ExxonMobil, stop producing fossil fuels,’ and we’ve solved the problem,” he said. “All these products are used by people. »

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