If you are an international corporation enjoying huge profits which might be reduced in the short term by the actions necessary to reduce emissions of green-house gases and you are solely focused on short-term profits and therefore want to undermine that scientific consensus, how would you do that? Well, you could try bribery.
According to an article in the Guardian: (Why do we have to read the British press to find out what is going on?)
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).