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PLAN B: Mobilizing to Save Civilization features Lester Brown, environmental visionary and author of “Plan B.” This documentary delivers a clear and unflinching message – either confront the realities of climate change or suffer the consequences of lost civilizations and failed political states. Brown, together with other notable scholars and scientists, including Nobel Laureate Paul Krugman, Pulitzer Prize winner and New York Times columnist Thomas Friedman, former Governor and Secretary of the Interior Bruce Babbitt, provides a glimpse into a new and emerging economy based upon renewable resources as well as strategies to avoid the growing threat of global warming. (From PBS)