用所給單詞的適當(dāng)形式完成短文。

The world itself is becoming much smaller by using modem traffic and modem communication (通訊設(shè)備)．Life today is much1.___ than it was hundreds of years ago, but it has brought new problems．One of the biggest problems is 2.____．To pollute means to make things dirty．Pollution comes in many ways．We see it, smell it, drink it and even hear it．

Man has polluted the earth．The more people, the 3.___ pollution．Air pollution is still the most 4.____．It’s bad for all 5.____ things in the world, but it is not the only kind of pollution．Water pollution 6.___ fish and pollutes our drinking water．Noise pollution makes us angry more easily．

Many countries are 7.___ rules to fight pollution．They stop people from8.___ coal in houses and factories and from putting dirty smoke into the air．Pollution by SO2 is now the most dangerous kind of air pollution．It is caused by heavy traffic．We are sure that if there are fewer people driving, there will be9.___ air pollution．The earth is our home．We must take care of it．That means 10.___ the water, land and air clean

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