text:  Water vapor is Earth's dominant greenhouse gas, not carbon dioxide or methane. People really don't know a lot of these things. They don't hear them in the press. Let's go back to the calls. Charles in Sevastopol, California. Welcome to the program. Charles, you are on the air with us. Right. Thanks so much, and thanks for having me. Great topic. Sure. A couple of things I'm going to squeeze in.