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Film trailer: 'Chasing Ice' documents glacial decline in time-lapse

Nature photographer James Balog's new documentary film, "Chasing Ice," featuring time-lapse photography of glacier movement and calving in Alaska, Iceland and Greenland, is making its way to theaters across the U.S. "I want [viewers] to be fascinated and to viscerally understand that climate change is real, and this is what it looks like," he told Popular Mechanics magazine for a profile article.