Long long ago, people lived in a clean world. There were no modern (machine). The air was fresh. However, life today has (bring) many new problems. One of the (big) is the environmental pollution. Noise pollution makes us hear more loudly and get ['æŋɡri] more easily. Light pollution is (harm) to birds. Air pollution is the most serious ( [kaɪnd]) of pollution. It is bad for all living things.

      Now, in order to protect our world, we need to do some important things. For , we should use both sides of paper and reuse plastic bags. Everyone should care for [waɪld] animals and plant more trees. Of course, easier said than done. (action) speak louder than words. If everyone knows the (important) of protecting the environment, the world will become more beautiful.

— Certainly.

要点提示：1. 导致空气污染的原因：燃烧的汽油，化工厂，越来越多的汽车等； 2. 空气污染产生的影响：呼吸问题，致癌，出行安全等；3. 治理措施与建议：政府采取措施限制废气的排放；多植树；宣传知识、绿色出行等。

— ___________.