Pollution is threatening marine life.
污染正危及海洋生物。
We are taking steps to prevent pollution.
我們正在采取措施防止污染。
Steps are to be taken to abate pollution.
應該采取措施減少污染。
Pollution is still very much a live issue.
污染仍然是目前非常讓人關注的問題。
Cars cause pollution, both smog and acid rain.
汽車引起污染，既有煙霧又有酸雨。