ExxonMobil, the world's largest oil group, has become a major funder of the most visible "greenhouse skeptics", most of whom who have traditionally been funded by the coal industry -- including S. Fred Singer, Patrick Michaels, Robert Balling and Sherwood Idso. Now the Guardian of London reports [3] that ExxonMobil is planning a public relations offensive to win back consumers and investors, amid fears the company is losing the war of words over climate change. A boycott of Exxon has seen support from celebrities such as Bianca Jagger and 350,000 hits on its Stop Esso website [4].