一、air pollution是什么意思？

air pollution 英[e?(r) p??lu??n] 美[er p??lu??n] n. 空氣污染; [網(wǎng)絡(luò)] 污染; 大氣污染; 空氣污染物; [例句]The air pollution exceeds most acceptable levels by 10 times or more. 大氣污染程度超出了普遍認(rèn)可的標(biāo)準(zhǔn)10倍或更多。

二、噪音污染引起的原因！用英語？

Noise pollution comes from such machines as aeroplanes, motor vehicles, construction machinery, and industrial equipment. Noise does not dirty the air, water, or land, but it can cause discomfort and hearing loss in human beings and other animals.