worlddirtyfromangrylittlecausefightbutkeepevenLifetodayismucheasierthanitwashundredsofyearsago，butithasbroughtnewproblems．Oneofthebiggestproblemsispollution．Topollutemeanstomakethin
world dirty from angry little cause fight but keep evenLife today is much easier than it was hundreds of years ago，but it has brought new problems．One of the biggest problems is pollution．To pollute means to make things （1）___．Pollution comes in many forms．We see it，smell it，drink it and（2）___ hear it．
Man is now slowly polluting the whole（3）___．
Air pollution is still the most serious．It's bad for all living things in the world，（4）___ it is not the only kind of pollution．Water pollution kills our fish and pollutes our drinking water．Noise pollution makes us（5）___ more easily．
Many countries are making rules to（6）___ pollution．They stop people（7）___ burning coal in houses and factories in the city，and from putting dirty smoke into the air．Pollution by SO2is now the most dangerous kind of air pollution．It is（8）___ by heavy traffic．We are sure that if there are fewer people driving，there will be（9）___ air pollution．
The earth is our home．We must take care of it．That means（10）___ the land，water and air clean．And we must take care of the rise in pollution at the same time．