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Al Gore: The Green Revolution Is ‘Unstoppable’

Despite a tough political climate, the environmental activist is still optimistic.

National Geographic – July 2017

By Brian Clark Howard

With his 2006 documentary, An Inconvenient Truth, former U.S. vice president Al Gore drew public attention to the threat of climate change. This July, An Inconvenient Sequel opens in theaters. Gore, 69, says the stakes are higher now but the solutions are clearer. Read more.