NBC's Katy Tur, responding to an article in the New Yorker about climate, looked into the camera and asked, "How pointless is my life? And how pointless are the decisions that I make on a day-to-day basis when we are not focused on climate change every day, when it's not leading every one of our newscasts?" It's a safe bet that not only will climate change not lead all newscasts, it will not even lead Tur's very often. And the reason is not any of those often proffered for failure to act in ways activists prefer. It won't be that...