Washington Post: We have arrived at a strange moment in the history of the environmental movement, caught as we are between the political stagnation of Copenhagen in December and the celebration of Earth Day’s 40th anniversary this week. It is a time, if three books now being published are any indication, for reassessment. But if the tenor is contemplative, it is anything but resigned. And if there’s consensus, it seems to be that the era of easy fixes — eat organic, drive a Prius, think about installing …