Guardian: ExxonMobil Market capitalisation: $282bn Revenue: $337bn Net income: $21bn The oil giant environmentalists love to hate, Exxon has drawn flak in recent years for its stance on global warming and financial support for groups on the lunatic fringe of the climate debate. Officially its view has softened in recent years but the company, one of the biggest and most profitable in the world, remains very much an oil man’s oil firm. The BP spill looks likely to relieve it …