Two weeks ago the Oversight and Reform Committee of the US House of Representatives sent letters to the biggest oil companies operating in the US, and demanded they come and answer questions in an investigation that starts this week into funding climate denial. The first of these hearings began yesterday. Interestingly in the same week the hearings began, Exxon Mobil has said that it has parted ways with Keith McCoy, the lobbyist who divulged on video how the company’s climate strategy worked. Exxon Mobil did not want to comment on the matter because it was personal to McCoy. The complainants cited by the Oversight and Reform Committee include Exxon Mobil, Chevron, BP, Shell and the American Petroleum Institute, and they…