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EmbedVideo(3552, 482, 304); Roughly 50 percent of people show signs of arthritis in the knee, and scientists at Stanford University believe better walking habits can go a long way to alleviate the pain. Mark Cutkosky, a Stanford…

In collaboration with Louisiana Public Broadcasting, the PBS NewsHour examines the vanishing coastline of Louisiana and the effect it's having on the native tribes who live there. This report is part of our series Coping with Climate Change.