Large forests are important to us, in many ways. They give us wood for building and heating. They are a home for many kinds of plants and animals. And for many city people, forests are a place to go for a vacation. People can learn about nature there. Thay can breathe fresh air and sleep in a Quiet place.
But there is one more reason why forests are important for everyone. The leaves on the trees in a forest help clean the air. Dirty air is a problem in many parts of the world. Without our forests this problem might be much worse.