The documents, filed in the 2019 case and reported on by Inside Climate News via Ars Technica, include an internal memo from 1988 in which Frank Sprow of Exxon's corporate research department warned colleagues that if global action on greenhouse gases emerged, "substantial negative impacts on Exxon could occur." The memo was previously quoted by The Wall Street Journal in 2023 but has now been published in full.
The filings also contain more recent statements from Exxon scientists challenging the company's claims about its work on biofuels and carbon capture and storage. These documents are being reported on for the first time.
The disclosures come as part of an ongoing lawsuit brought by the state of Massachusetts against ExxonMobil, accusing the company of misleading investors and the public about climate risks and its own knowledge of climate science.