And a new investigation by Mother Jones magazine has revealed that ExxonMobil has spent at least $8 million funding a network of groups to challenge the existence of global warming. The magazine has identified 40 think tanks, media outlets and other organizations including the American Enterprise Institute, the Annapolis Center For Science-Based Public Policy, the Competitive Enterprise Institute and the Media Research Center. The report also names a list of so-called experts that have been paid to publicly question global warming. The list includes Steven Milloy who is a columnist for FoxNews.com. Two groups run out of his home have received $90,000 from Exxon Mobil. Mother Jones also reports that less than a month after President Bush took office, an Exxon-Mobil lobbyist named Randy Randol sent a memo suggesting certain climate experts from the Clinton administration should be “removed from their positions of influence” A year later the Bush administration blocked one of the scientists–Robert Watson–from his post at the Intergovernmental Panel on Climate Change. The magazine’s report comes as environmentalists are preparing to celebrate the 35th anniversary of Earth Day on Friday.