text: The massive amounts of pollution in the air is convincing large amounts of people and governments to start creating societies and communities that are car free, or very expensive to own cars in. In some cases of extreme pollution, the government has made it so the next few days, there would be no cars allowed, except taxis and buses. The results from both of these have been very possitive. When France had issued one of the days, the results were 60 % less in on of the most polluted cities in the world.