综合填空。根据短文内容，用所给单词的适当形式填空。

loud,   live,   pollution,   easy,   pollute,   waste      Life today is much better. However, there are new problems. One of the biggest ones is pollution. Water   1   has made rivers dirty. It kills fish and   2   our drinking water. Noise pollution makes us speak   3   and become angry more   4  . Air pollution is the most serious kind of pollution. It's bad for all   5   things in the world.

1._________     2.________     3.________    4.________    5._________