Washington Post: Electronic files that were stolen from a prominent climate research center and made public last week provide a rare glimpse into the behind-the-scenes battle to shape the public perception of global warming. While few U.S. politicians bother to question whether humans are changing the world’s climate — nearly three years ago the U.N. Intergovernmental Panel on Climate Change concluded the evidence was unequivocal — public debate persists. And the newly disclosed private exchanges …