Now we can see many people are cutting down the trees in the forests. A lot of rich land ______ deserts(沙漠). If we read newspapers, we’ll learn that the forests are getting ______ all the time. We are cutting down large numbers of trees ______ we need wood and farmland. Some ______ say that there will not be any great forests in 20 or 30 years. ______ will happen if the forests disappear(消失)? A lot of plants will die and the animals will lose their ______. In many places the new farmland will soon look ______ the old deserts. Crops(庄稼) will not grow there.

There won't be enough rain, and the weather will get hot and dry. If the climate(气候)of the earth changes, life will be hard for everyone. Our living environment will become ______. More and more rich farmland will disappear. We will suffer a lot from both droughts and floods.

It's our duty ______ the forests well. Everyone should try his best to make a contribution(贡献) to taking care of the forests. ______ cutting down the trees and make the world greener.