A trove of internal documents and research papers has previously established that Exxon knew of the dangers of global heating from at least the 1970s, with other oil industry bodies knowing of the risk even earlier, from around the 1950s. They forcefully and successfully mobilized against the science to stymie any action to reduce fossil fuel use.
https://www.theguardian.com/business/2023/jan/12/exxon-climate-change-global-warming-research
And then there is also this: