On September 25th, 2015, Pope Francis address Congress during his historical visit to the United States. He encouraged environmental stewardship and social responsibility. Noting that climate change affects the most vulnerable, poverty stricken global citizens, Pope Francis declared that “any harm done to the environment… is harm done to humanity.”
Read his speech in its entirety here: https://www.theguardian.com/environment/2015/sep/25/pope-franciss-speech-to-the-un-in-full