text: A really big problem in our environment today is air pollution. Reduced car usage leads to less gas having to be drilled from oil mines and places underground. It also comes with a bundle of less smog and a stronger, cleaner, atmosphere. Even a businessman in Columbia commented "It's a good opportunity to take away stress and lower air pollution," in source 3 paragraph 24 as he participated in the annual car-free day. The better the environment and air pollution the healthier the oxygen.