text: Limiting car usage will clean up the pollution by a lot. There have been "efforts in the plast two decades to make cities denser." Some places have started to do that by limiting cars, and they have decreased the ammount of pollution where they live. Paris has "enforced a partial driving ban to clear the air of the global city." They only did that because days have been so close to near record pollution. They had limited the days people can drive and only after five days the congestion was down sixty percent. If there is a decrease in pollution the air would be much cleaner to breathe for everything, plants, animals and most importantly us humans.