An undercover sting by Greenpeace has revealed that two prominent climate sceptics were available for hire by the hour to write reports casting doubt on the dangers posed by global warming.
Posing as consultants to fossil fuel companies, Greenpeace approached professors at leading US universities to commission reports touting the benefits of rising carbon dioxide levels and the benefits of coal. The views of both academics are well outside mainstream climate science.
The findings point to how paid-for information challenging the consensus on climate science could be placed into the public domain without the ultimate source of funding being revealed.
They come as government ministers meet in Paris this week to try to reach an agreement to fight climate change, and one month after it emerged that ExxonMobil and Peabody Energy were under investigation in the state of New York over claims of misleading the public and investors about climate change.