What can you do to reduce air pollution?

What can you do to reduce air pollution? You may not do much, but if a lot of people did a little, that would be a lot.

Cars pollute the air and often there is one person in the car. Using a bus is a smart solution because it carries a lot of passengers.

Green plants are useful. Because of the trees we have fresh air.

Solar energy is underutilized in the world. She’s not dangerous.