Not too long ago the British were hot about global warming. As The New York Times notes, climate change was such a big deal in the U.K., Parliament put targets for emissions cuts into national law a couple years ago. But there’s been a cooling of British opinion on warming, following months of reports about allegedly skewed science, mistakes in key reports and other developments rattling the research supporting climate change theory. A BBC poll in February found just 26 percent believe man-made climate change is happening — down from 41 percent in November. “Legitimacy has shifted to the side of the climate skeptics, and that is a big, big problem,” says Greenpeace spokesman Ben Stewart. “This is happening in the context of overwhelming scientific agreement that climate change is real and a threat. But the poll figures are going through the floor.” Greenpeace, other environmental groups and scientists who swear by man-made global warming say inaccuracies in a United Nations report and e-mail traffic suggesting climate scientists fudged numbers to bolster their research have been blown out of proportion. They’re urging global warming believers to fight back. But it’s hard to restore lost credibility once regular people, British and others, doubt your integrity and your motives.