7 agos 1972 anni - 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
Aggiunto al nastro di tempo:
Data:
7 agos 1972 anni
Adesso
~ 53 years ago