Later this month, on June 18, the Vatican is going to release a statement by Pope Francis concerning climate change, and one of the speakers who is scheduled to present the letter is Professor John Schnellnhuber, founder of the Postdam Institute for Climate Impact Research. Schnellnhuber has spent some time advising German President Angela Merkel about global warming and, as reported by conservative news outlet Breitbart, has stated that the world is currently overpopulated by six billion people. Just to make this point more clear, there are only seven billion total people on the planet, so yeah, this guy thinks...