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1·Air pollution has risen above an acceptable level.

空气污染已经超标。《牛津词典》

2·Air pollution in the city had reached four times the acceptable levels.

这座城市的空气污染程度曾高达可接受标准的四倍。《牛津词典》

3·Cases of breathing difficulties increase in lockstep with air pollution.

呼吸困难的病例随空气污染的加剧而增加。《牛津词典》

4·The new government has yet to grapple with the problem of air pollution.

新政府还需尽力解决空气污染问题。《牛津词典》

5·High places are free of air pollution.

高处没有空气污染。

6·Climate change will cause air pollution and diseases.

气候变化会导致空气污染，引发疾病。

7·Burning gas, oil and coal creates air pollution.

燃烧可燃气体、石油和煤炭会产生空气污染。

8·People can reduce air pollution by riding bicycles.

人们可以通过骑自行车减少空气污染。

9·What is the man's advice on reducing air pollution?

这位男士对减缓空气污染有什么建议？

10·It causes environmental problems, like air pollution and temperature rise.

它可导致环境问题，如空气污染和温度上升。