An undercover Greenpeace operation has suggested that some researchers who dispute mainstream scientific conclusions on climate change are willing to conceal the source of payment for their research , even if the money is purported to come from overseas corporations producing oil , gas and coal . The commentators — a professor from Princeton University and one from Pennsylvania State University — agreed to the offers. Two Greenpeace employees posed as representatives of coal companies and offered to pay prominent commentators to write papers that discuss the benefits of coal and carbon emissions . The Greenpeace employees also asked that the payments not be disclosed . The commentators , a professor from Princeton University and one from Pennsylvania State University , agreed to the offers .
An undercover Greenpeace operation has suggested that some researchers who dispute mainstream scientific conclusions on climate change are willing to conceal the source of payment for their research , even if the money is purported to come from overseas corporations producing oil , gas and coal . Two Greenpeace employees posed as representatives of coal companies and offered to pay prominent commentators to write papers that discuss the benefits of coal and carbon emissions . The Greenpeace employees also asked that the payments not be disclosed . The commentators , a professor from Princeton University and one from Pennsylvania State University , agreed to the offers .