Alleging that global warming is a scam, an American professor has branded the money-spinner as "the greatest and most successful pseudoscientific fraud" he has ever seen.
Professor Harold Lewis claimed that man-made climate change has become a "scam" driven by "trillions of dollars" which has "corrupted" scientists.
Lewis made the remarks after formally resigning from the American Physical Society (APS).
He compared the APS now to the organization he joined 67 years ago which he said was "much smaller, much gentler, and as yet uncorrupted by the money flood".
"How different it is now. The giants no longer walk the earth and the money flood has become the raison d'etre of much physics research," the Daily Express quoted Lewis, as saying.
"It is of course, the global warming scam, with the (literally) trillions of dollars driving it, that has corrupted so many scientists, and has carried APS before it like a rogue wave. It is the greatest and most successful pseudoscientific fraud I have seen in my long life as a physicist," he added.
APS President Professor Curt Callan however dismissed the allegations of "pseudoscience".
"The use of the word 'scam' is ridiculous. To dismiss the work of large numbers of honest, hard-working scientists as a scam is just silly," Callan said.