Most people don't see how climate change is affecting their lives — and that's a problem

Heidi Cullen is the blame changer. For someone who’s been immersed in the scary realities of global warming for so long, Cullen is surprisingly optimistic. Marius Bugge According to a recent Yale survey, 7 in 10 Americans believe global warming is real and ­happening. And 6 in 10 believe it is affecting U.S. weather. But only…