Mr. Bush's father, when he was president, signed off on America's first nationwide cap-and-trade scheme to control emissions of the gases that cause acid rain.
Bush父亲在任时正式批准了美国首个全国性的配额交易计划，该计划旨在控制引发酸雨的气体排放。
The research is significative and instructive in some extent to prevent and control acid rain pollution of Hunan province.
本文的研究对于湖南省城市大气污染和酸雨污染的控制方向具有一定的参考意义。
From water body, plants, buildings and human health etc. to discuss the harmfulness of acid rain and urgency of acid rain control in detail.
文章从水体、植物、建筑群、人体健康等几个方面，详细讨论了酸雨的危害性和酸雨防治的迫切性。
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