ExxonMobil is under investigation by the New York State Attorney General for potentially misleading shareholders about the threat of climate change. The subpoena comes after reports, including from InsideClimate News, about Exxon's pivot from supporting state-of-the-art research to funding a network of climate denial groups.

Observers have noted that Exxon's campaign of misinformation mirrors what Big Tobacco did about the risks of smoking. That industry is still paying a $246 billion settlement. Bob discusses the pattern, the two prosecutions, and what might come next with Naomi Oreskes of Harvard, co-author of Merchants of Doubt: How a Handful of Scientists Obscured the Truth on Issues from Tobacco Smoke to Global Warming.

Then, Bob revisits his conversation earlier this fall with ExxonMobil's Richard Keil, who responded to the InsideClimate News reporting.

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