No Proof of Man-Made Climate Change, Says Greenpeace Co-founder

"There is no scientific proof of man-made climate change, a co-founder of Greenpeace told a committee of the U.S. Senate, rebutting claims made by environmental activists, prominent politicians, and a steady stream of media reports of a nearly unanimous 'consensus' among scientists about 'overwhelming' evidence that man-made emissions of greenhouse  gases — mainly carbon dioxide — are responsible for global warming."