Of interest:

an Sample, science correspondent
Friday February 2, 2007
The Guardian

Scientists and economists have been offered $10,000 each by a lobby
group
funded by one of the world's largest oil companies to undermine a major
climate change report due to be published today.

Letters sent by the American Enterprise Institute (AEI), an
ExxonMobil-funded thinktank with close links to the Bush administration,
offered the payments for articles that emphasise the shortcomings of a
report from the UN's Intergovernmental Panel on Climate Change (IPCC).
[...]

http://www.guardian.co.uk/international/story/0,,2004230,00.html