Why Is This Happening? With Chris Hayes

Much of Maui has been decimated following one of the deadliest wildfires in U.S. history, wildfires are still ravaging Canada, ice in the arctic is melting rapidly, sea levels are rising and we’ve had the hottest day measured on our planet this year. There’s a lot happening as it relates to climate change. “It’s not the summer from hell, it’s the summer that sort of is hell,” says our guest this week. Bill McKibben is an environmentalist, educator, author and founder of Third Act, which has a mission to organize people over the age of 60 for action on climate and justice. He’s also a founder of 350.org, the first global grassroots climate campaign. His 1989 book, “The End of Nature” is regarded as the first book for a general audience about climate change. McKibben recently wrote a piece for the New Yorker titled, “To Save the Planet, Should We Really Be Moving Slower?,” which talks about the degrowth movement, which calls on countries to embrace zero or negative G.D.P. growth, making a comeback. He joins WIT