Bill McKibben
An American environmentalist and writer, Bill McKibben is the founder of 350.org, an international climate campaign. This October 10, 350.org is organizing the second annual 350 International Day of Climate Action, with thousands of events planned at iconic places around the world. Bill frequently writes about global warming, alternative energy, and the risks associated with human genetic engineering. Beginning in the summer of 2006, he led the organization of the largest demonstrations against global warming in American history. McKibben is active in the Methodist Church, and his writing sometimes has a spiritual bent.