This lecture looks at the history of the tactics of some global warming deniers and the nature of their arguments, as well as the history of the science of global warming (often portrayed as incredibly new, and therefore can't be trusted 'cause of its newness):
http://www.uctv.tv/search-details.aspx?showID=13459
Also, it strikes me there may be a more direct link between the tactics of AGW deniers and other woo groups. I know there are US evangelicals that accept evolution and global warming, but there is a sizeable population of evangelicals who reject both. Alex Jones, conspiracy theory nitwit, doesn't believe global warming is caused by human activity. GReNME cited another example. Groups who reject scientific evidence and consensus overlap, and there may be some cross pollination of tactics going on.
GReNME, I think and hope that much of the debate has moved past whether or not AGW is happening -- certainly the scientific debate has. But I think there will be a persistent need to restate what is known and how it is known, just as there is over evolution, real history and anything else attacked by anti-intellectual individuals and groups.