On Friday the U.S. government issued a climate report saying that global warming is severe and will soon affect us economically. We see the fires, droughts, and other natural disasters. Anybody with eyes can tell that the polar ice caps are shrinking. There’s no question that environmental change is happening, but what’s causing it? Are humans responsible? In this episode, Stephen addresses what we know, what we don’t know, and what our responsibility is in this era.