There are a lot of reasons not to get too worked up over the impact we're having on our planet. Politicians don't appear to be very concerned.
Business people say calls to action are alarmist.
No wonder most Americans, while professing environmentalism, remain unmoved by the looming but shadowy questions. We became big enough as a species to affect everything around us. The story of the next decade is increasingly going to be the story of the effects of crossing that threshold. It's true that we don't know precisely what these effects will be, said Jane Lubchenco, professor at Oregon State University and past president of the American Association for the Advancement of Science. Scientists are only beginning to understand how . . .