Many wild animals are facing the danger of extinction, because the environment that they are living in has changed greatly. For example, with the developmet of cities, the using of insecticide and serious pollution, their living areas have become narrowcr and narrower. Many of the wild animals, now are confronted with food crisis. At the same time, man is killing off species just for getting their fur, skin, horns, teeth and meat.

In order to protect our resources of ecology, people should realize that the loss of any species is at least the loss of source of knowledge and a source of natural beauty. There fore, measures of the following should be taken: pollution standards are made to keepdown poisons; killing off certain rare species is prohibited 初二; national parks should be set up as wild life, reserves.

Only if we human beings take some drastic measures can wild animals be preserved.

本文來自：逍遙右腦記憶 http://yy-art.cn/chuzhong/32681.html

相關(guān)閱讀：above 與 over的用法區(qū)別