7 agos 1972 año - Growing public awareness and concern for controlling water pollution led to sweeping amendments in 1972. As amended in 1972, the law became commonly known as the Clean Water Act (CWA). The 1972 amendments: Established the basic structure for regulating pollutant discharges into the waters of the United States.Aug 8, 2017
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7 agos 1972 año
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