Rajendra Pachauri said he thought he was "walking into the lion's den" Tuesday when he told oil executives they need to take a lead in cutting greenhouse gas emissions in order to save the earth... "I was very struck by (ConocoPhillips Chief Executive) Jim Mulva's presentation when he talked about the pressure that the public is going to put on legislators and on companies," Pachauri said. "And those who do not accept that reality will face a huge reputational risk."... Pachauri noted Europe's BP Plc and Royal Dutch Shell Plc have long said emissions must be cut.