14. It is really a terrible thing.
20. Some scientists say that there will be no vast forests in 20 or 30 years.
22. The human beings will be punished for their forest-destroying activities.
23. We should do our best to protect our living environment and keep mountains green,water clean, and the sky blue.
28. The areas of forests are getting smaller and smaller.
29. The weather will get hot and dry. The whole earth will become a big desert. A lot of plants and animals will disappear. Crops will not grow anywhere. Life will be difficult for everyone.
32. Where the forests disappear, dust storms will occur occasionally.
37. Now in some places of our country, a number of people have been cutting down the trees in the forests because they need wood and more farmland.
