This isn't new, or perhaps I should say, it isn't surprising. He's being saying such things for at least a decade. See <a href="http://www.theguardian.com/politics/2007/feb/16/1" rel="nofollow">http://www.theguardian.com/politics/2007/feb/16/1</a> :<p>> Yesterday's Independent devoted half a page to an article entitled Nuclear Energy? Yes Please, by Canadian Dr Patrick Moore, billed as "a former leader of Greenpeace, and chair of Greenspirit Strategies". And therefore, presumably, a man well placed to question British environmentalists' misguided suspicions about nuclear power. Might it have helped the paper's readers to understand his stance had they known that his last involvement with Greenpeace was 21 years ago; that he currently heads something called the Clean & Safe Energy Coalition, which is reportedly wholly funded by the US Nuclear Energy Institute; that he wrote last year to the Royal Society arguing there was "no scientific proof" that mankind was causing global warming; and that he is on record advocating the felling of tropical rainforests and the planting of genetically engineered crops? Guess we'll never know.
Does it really matter if humans are the main cause or not? If it is happening, it is bad for humans and we have to figure out some way to stop it. That's all that truly matters.