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Study shows divide over societal issues HARTFORD, CT (wnpr) - A new study by the Cultural Cognition Project at Yale Law School finds that Americans are divided on a range of societal risks from global warming to gun control to the HPV vaccine. As Yale law professor and researcher Dan Kahan tells WNPR's Diane Orson, one reason Americans are so polarized is they disagree on the facts. © Copyright 2012, wnpr