"Our analysis allows us for the first time to actually put a number on what Exxon knew, which is that the burning of their fossil fuel products was going to heat the planet by about 0.2C of warming every decade," he said.
Researchers have never before quantified the scientific evidence in ExxonMobil's documents, he says.
...
"Their excellent climate modelling was at least comparable in performance to one of the most influential and well-regarded climate scientists of modern history," Prof Supran said, comparing ExxonMobil's work to Nasa's James Hansen who sounded the alarm on climate in 1988.
Prof Oreskes said the findings show that ExxonMobil "knowingly misled" the public and governments. "They had all this information at their disposal but they said very, very different things in public," she explained.
ExxonMobil: Oil giant predicted climate change in 1970s - scientists - BBC Newshttps://www.bbc.com/news/science-environment-64241994