good, loud, living, pollution, easily, pollute, waste，most

Life today is much  73 . However, there are new problems. One of the biggest ones is pollution. Water   74  has made rivers dirty. It kills fish and   75  our drinking water. Noise pollution makes us speak  76  and become angry more  77 . Air pollution is the  78 serious kind of pollution. It’s bad for all  79  things in the world.