because it will affect the environment. Nowadays air pollution is a grave problem we cannot stop it but we can decrease it as
much as we can. However, automobile exhaust has become the main reason of air pollution and we even can't control it.
So we must reduce car use in 20 years, if we can reduce car use in 20 years then we must can decrease the the
air pollution in the world. But reduce car use is a hard task, nobody like walking instead of driving. Nowadays people are lazy
they will just do for theirselves they won’t leave cars in their life. Automobile has been the most important thing in people's life, but no one has ever thought the consequence in the future. Maybe we wont be effective by the air pollution, but our children
our children’s children, our offsprings, they won’t have a wonderful life.
Now, lets stop this, do as much as we can.