What' s more, every citizen should realize the seriousness of the problem and make concerted efforts to protect our environment. In addition, planting trees helps improve and beautify the environment.
译文：保护环境
我们生活的世界正变得越来越难以忍受,因为对环境的破坏. 禽流感和SARS的是两个典型的例子,对环境的破坏,可能危及自己的生命. 此外,森林破坏,水和空气污染导致减少种植业土地及不愉快的天气.
严重的问题,看来,我们可以得出一些措施来对付它. 首先,当局应该采取的政策是"可持续发展" , 法律和有关环保工作应该要付诸实施,执法不严,正如我国政府一直在做的事.
何况, 每个公民都应该明白问题的严重性,并共同努力,为保护我们的环境. 此外,植树有利于改善和美化环境.
3.Man and His Environment
Throughout history man has changed his physical environment in order to improve his way of life. With the tools of technology he has altered many physical features of the earth. He has transformed woodlands and prairies into farms and made lakes and reserviors out of rivers for irrigation purposes or hydroelectric power. Man has also modified the face of the earth by draining marshes and cutting through mountains to build roads and railways.
However, man's changes to the physical environment have not always had beneficial results. Today, pollution of the air and water is an increasing danger to the health of the planet. Each day thousands of tons of gases come out of the exhausts of motor vehicles. Smoke from factories pollutes the air of industrialized areas and the surrounding areas of the countryside. The pollution of water is equally harmful. The whole ecological balance of the sea is being changed and industrial wastes have already made many rivers lifeless.
