Caleb Kenna is a freelance photographer and certified drone pilot in Middlebury, Vermont. His work has been published by the New York Times, Boston Globe, Wall Street Journal, Los Angeles Times, National Geographic, Outside, and the Vermont Land Trust.

Bill McKibben is an author and environmentalist. His 1989 book The End of Nature is regarded as the first book for a general audience about climate change, and has appeared in 24 languages. He is founder of 350.org, the first planet-wide, grassroots climate change movement. The Schumann Distinguished Scholar in Environmental Studies at Middlebury College and a fellow of the American Academy of Arts and Sciences, he was the 2013 winner of the Gandhi Prize and the Thomas Merton Prize, and holds honorary degrees from 18 colleges and universities; Foreign Policy named him to their inaugural list of the world's 100 most important global thinkers, and the Boston Globe said he was "probably America's most important environmentalist." A former staff writer for the New Yorker, he writes frequently a wide variety of publications around the world, including the New York Review of Books, National Geographic, and Rolling Stone. He lives in the mountains above Lake Champlain with his wif