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Rep. Khanna to Big Oil: 'This is about getting at the truth'

Environmental groups and their congressional allies hope the hearing evokes the Big Tobacco hearings of the 1990s, which began a shift in public opinion about that industry. Energy industry representatives plan to focus on their current support of climate action.

It will be the first time that executives of the top oil majors - ExxonMobil, Shell Oil, BP America and Chevron - and the heads of the American Petroleum Institute and Chamber of Commerce will answer questions about climate change in Congress under oath.