"I got a call the other day from some producers I very much admire. They wanted to talk about a series next year on global warming and I thought, why does this subject make me instantly tired? Global warming is important, yes; controversial, certainly; complicated (OK by me); but somehow, even broaching this subject makes me feel like someone's put heavy stones in my head. Why is that?"
Robert Krulwich reports for NPR's Krulwich Wonders blog September 26, 2011.