Environment News Service: Climate change is real, it is caused by human activities and humans have a responsiblity to control it, mayors from around the world declared Tuesday during a meeting at the Vatican convened by Pope Francis to fight global warming and human trafficking.
The Vatican`s Pontifical Academy of Sciences invited the more than 60 mayors to a two-day conference entitled "Modern slavery and climate change: the commitment of cities" to influence world leaders ahead of the United Nations climate summit in...