FILE - In this Saturday, Jan. 17, 2015, file photo, Pope Francis waves to the faithful on his arrival in Tacloban, Philippines, as rain drips from the roof of his vehicle. For months, Francis has been drafting an encyclical on the environment and global warming which he hopes to release by June or July 2015. In a news conference as he traveled last week to the Philippines, he said global warming was "mostly" man-made. And he said he wanted his encyclical out in plenty of time to be absorbed before the next round of U.N. climate change talks in Paris in November after the last round in Lima, Peru, failed to reach an agreement. (AP Photo/Wally Santana)
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