Bill McKibben

Bill McKibben is a writer and environmentalist. He is the author of many books, and has written for the New Yorker, the New York Review of Books, National Geographic, and more. He is also the founder 350.org.
McKibben frequently works with his wife, writer Sue Halpern. Halpern is the author of several books including, most recently, A Dog Walks Into a Nursing Home.