Ahead of a UN climate summit, Catholic, Orthodox, and Anglican leaders jointly promote a “Season of Creation.” In their first joint statement ever, the spiritual leaders of Christianity’s three largest denominations addressed the United Nations. “Listen to the cry of the earth, pledging meaningful sacrifices,” stated their appeal. “We must decide what kind of world we want to leave to future generations.” Pope Francis of the Roman Catholic Church; Bartholomew I, ecumenical patriarch of the Eastern Orthodox Church; and Justin Welby, the evangelical Anglican archbishop of Canterbury, issued their plea this month to delegates attending next month’s UN climate summit…