Last week, Andrew Wheeler, the head of the Environmental Protection Agency, said climate change is not his top priority. “Yes, [the] climate is an issue and we are working to address it,” he told Reuters, while nonetheless downplaying recent findings by EPA scientists that detailed the size and time-sensitivity of the problem. But Bill McKibben, author of the new book Falter: Has the Human Game Begun to Play Itself Out?, wants you to panic about climate change.