A veteran leader in the environmental movement, Carl Pope is the former executive director and chairman of the Sierra Club. He is now the principal advisor at Inside Straight Strategies, focusing on the links between sustainability and economic development, and serves as a senior climate advisor to former New York City mayor and philanthropist Michael Bloomberg. He was a founder of the BlueGreen Alliance and America Votes, and has served on the boards of the California League of Conservation Voters and the National Clean Air Coalition. The author of three books, he writes regularly for Bloomberg View and Huffington Post.