People will not be able to camp in the forests. If we dump trash and garbage into the rivers and oceans, the waters will become polluted or dirty. The dirty water will be unhealthy for people to use. It will also be harmful to the fish and other water animals. If we let factories pour smoke into the air, our air will become polluted.
Polluted air can make our eyes sting and fill with tear.
It can make paint on buildings fade and peel off. It can eat away metal. It can kill trees and hurt other plants. Polluted air hurts almost everything it touches. Trees, water, and air are some of our most important natural resources.