Pacific Standard: Comparing someone or something to Hitler has become something of a running joke, but then again, those hyperventilated comparisons usually come from anonymous cranks in online chat rooms. When a true expert like Yale Universitys Timothy Snyder says that climate change could bring on conditions similar to those that led to the Holocaust, you sit up and listen. onEarth talked to the history professor about his new book, Black Earth: The Holocaust as History and Warning, climate change, and the lessons...