Do you know who invented paper? A Chinese man1Cai Lun invented paper almost 2,000 years ago. He made paper2wood.

    Now we still use wood3paper. We use a lot of paper every day. If we keep on4so much paper, there will not be any trees left on the earth. If5no trees, there will be no paper. Every day, people6about 2,800 tons of paper. We use 17 trees to make one ton of paper. This means we are cutting nearly 48,000 trees every day.

    Since it7more than 10 years for a tree to grow, we must start using8paper now. So how can we save paper? We can use both sides of9of paper, especially when we are making notes. We can choose drinks in bottles instead of those in paper packets. We can also use cotton handkerchiefs (手帕). When we go shopping, we can use fewer paper bags. If the shop assistant gives us a paper bag, we can save it and reuse it later.

    Everyone can help to save paper. If we all think carefully, we can help10trees. But we should do it now, before it is too late.

    Trees are important and they can help us in many ways. However, some of them are in danger and need to be taken care of as much as possible. There are some ways to save trees.

    Use paper wisely. We can save trees by using paper in a right way. What can we do? Use both sides of paper when doing homework. Borrow books to read when you needn't buy them. Never throw old books away, but be kind to donate them to others who need them. Use cloth towels instead of paper towels.

    Plant trees. To save trees, it's a great idea to plant them. Spring is the best season to plant trees. If everyone around us does it, millions of trees will appear and make our world become green and beautiful.

    Tell people to understand the importance of trees and help save trees. Try to write letters to government officials (官员) and persuade (劝) them to use as little paper as they can.

    Trees are an important part of the Earth. They provide wood for buildings and things for making paper. They provide homes for all kinds of insects, birds and other animals. For example, many birds live in trees. Many kinds of fruits come from trees, such as apples, oranges, pears and peaches.

    Trees also help keep our air clean and our ecosystems healthy. We breathe in oxygen and breathe out harmful gases. However, trees breathe in harmful gases and breathe out oxygen. And trees can help other plants grow because they can hold the soil. Trees keep the soil from being blown away, so plants can fight against strong winds.

    Trees do much for us, our environment, other plants and animals, but we don't just love trees for that. Trees can also be very beautiful—tall enough to touch the sky and so big around that we can't even hug them. So we should stop cutting down trees and enjoy the beauty of them.