text: The beneifit of going car-free, goes beyond making people happier, it might even save the human race. Global warming is a major problem. Though an even bigger problem, is that most people in the US do not believe that global warming even exists. One way that scientists know that global warming is happening, is by looking in the ice of the artic. By drilling deep holes in the artic, scientists can extract tubes of ice millions of years old. Just how you can tell how old a tree is by counting its rings, you can tell how old ice is by doing the same thing. When scientists tested the amount of Co2 in a sample of ice that was formed 50 years after the industrial revolution, then compared it to the level of  Co2 in a tube of ice 50 years before the industrial revolution. They saw a remarkable increase in Co2 levels after the industrial revolution. Many people do not know, but mercury looked a lot like earth a billion or so years ago. Now mercury is a desolated wasteland, thanks to the amount of volcanos spewing Co2 into the atmosphere. A similar phenomena is happening all over the world in places like Paris and China. Paris' pollution was so bad, that they had to ban driving for a couple days "On Monday motorists with even-numbered license plates were ordered to leave their cars at home or suffer a 22-euro fine"