"Read it, please. Straight through to the end. Whatever else you were planning to do next, nothing could be more important." --Barbara Kingsolver Twenty years ago, with The End of Nature , Bill McKibben offered one of the earliest warnings about global warming. Those warnings went mostly unheeded; now, he insists, we need to acknowledge that we've waited too long, and that massive change is not only unavoidable but already under way. Our old familiar...