Nation: A few weeks before the last great international climate conference-2009, in Copenhagen-the e-mail accounts of a few climate scientists were hacked and reviewed for incriminating evidence suggesting that global warming was a charade. Eight separate investigations later concluded that there was literally nothing to "Climategate," save a few sentences taken completely out of context-but by that time, endless, breathless media accounts about the "scandal" had damaged the prospects for any progress at...