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The pope’s five most important environmental arguments

In a much-anticipated papal letter released by the Vatican on Thursday, his holiness offered a sweeping defense of “our common home.”

Pope Francis attends his weekly audience in St. Peter's Square on Dec. 17, 2014 in Vatican City, Vatican. (Photo by Franco Origlia/Getty)
Pope Francis attends his weekly audience in St. Peter's Square on Dec. 17, 2014 in Vatican City, Vatican.Getty Images

Tony Dokoupil