We’ve seen the image of a half empty Lake Powell and the now iconic bathtub ring around its rim. We’ve heard the stories coming out of California about wells running dry. We’ve learned a new term: sprinkler shaming. We know enough to know we’re in a drought, but what does that mean? What is drought? What should we do about it and why should we even care? On The Source today, what we talk about when we talk about drought.