Environmentalists often predict an Apocalypse is coming: The earth will heat up like a greenhouse. We will run out of energy. Overpopulation will lead to starvation and war. Nuclear winter will kill all plants and animals. During the past fifty to one hundred years, Americans have heard many prophecies of doom, such as the Club of Rome report predicting the world economy would crash about the year 2020. These do not come as complete surprises without...