根据短文内容及首字母提示，填写所缺单词，使短文意思完整。每空一词。
The environment is becoming worse and worse . There are many kinds of pollution that I worry a 小题1:__. The most serious two are n___小题2:___ pollution and air pollution , because people can’t live h___小题3:___ with polluted air. Animals can’t live in the world , e___小题4:___. More and more people are becoming i___小题5:___because of polluted air .
I think factories should not p___小题6:____ dirty water into rivers directly. We’d better go on foot or by bike i___小题7:___of by car . Finally , everyone must pay a___小题8:____ to rubbish pollution . If everyone makes so much rubbish , one day we may live in a world f___小题9:____ of rubbish . How terrible it will be ! We should take a___小题10:___to make our world cleaner and more beautiful