Pollution can aggravate asthma.
污染会使气喘加重。
What's worse, pollution and waste of fresh water aggravate the situation.
更糟的是，污染和浪费淡水加剧了局势。
More cars would consume more petroleum, produce more air pollution, and thus aggravate the already serious environmental problems.
更多的汽车将消耗更多的石油，产生更多的空气污染，从而加剧了本已严重的环境问题。
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