 A power plant with a cooling tower or a chimney with something coming out of the chimney and say, well, this is carbon pollution. Well, it isn't. You can't see carbon dioxide. It's invisible. We each exhale about two pounds of carbon dioxide a day because as we burn sugars in our body, we create it. And then it's great for plants. There are hundreds of peer-reviewed studies that show that plants grow bigger and faster with higher levels of atmospheric carbon dioxide.