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。