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1 янв 1970 г. - Clean Air Act - acid emission regulations

Описание:

U.S. Congress imposed acid emission regulations through the Clean Air Act, strengthened two decades later in 1990. By the 2000s, sulfate and nitrate in precipitation had decreased by some 40 percent.

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Health and Wellness

Bychyelle Jiazten milgrom
9 ноя 2019
0
0
527

Дата:

1 янв 1970 г.
Сейчас
~ 55 г назад
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