Mark Hertsgaard is a renowned investigative journalist and author of Hot: Living Through the Next Fifty Years on Earth. He has written for The New Yorker, Vanity Fair, Newsweek, and Mother Jones, has appeared on numerous programs (including The Today Show, The Charlie Rose Show, The Rachel Maddow Show, NPR’s Fresh Air and Morning Edition), and has lectured at Harvard, Yale, Stanford and dozens of other universities. He lives in San Francisco, California.