【答案解析】As is often broadcast in the radio or reported by TV report, we all know that the desert is advancing towards cities. What can we do to prevent the advancement of the sand? There is close relationship between desert and people. We build dams, cut down trees, block waters, so the nature is responding to our deeds. The desert is expanding at an alarming speed. People are fleeing from greedy sand hills. As the sand advances, we retreat.
Certainly the sand expansion should be stopped. We should return to the places where we have cut down trees. We should replant tress there. We should bring back what is originally there; even it is just a piece of rock, a drop of water etc. Also we should stop doing anything harmful to the environment. Our soil should be conserved. As we advance, the sand retreats.
The best way to fight back the greedy desert is that we should publicize the danger of desert expansion. We should teach not only children to protect our mother nature, but also the adults, and the businessmen. No one is allowed to make profits by harming the environment. We should set about the task of planting trees to reclaim the land and make it fertile.