pollution可数吗不染

　　Pollution is threatening marine life.

　　污染正危及海洋生物。

　　We are taking steps to prevent pollution.

　　我们正在采取措施防止污染。

　　Steps are to be taken to abate pollution.

　　应该采取措施减少污染。

　　Pollution is still very much a live issue.

　　污染仍然是目前非常让人关注的问题。

　　Cars cause pollution, both smog and acid rain.

　　汽车引起污染，既有烟雾又有酸雨。