Question

In which decade were the first important laws passed to decrease water pollution?

Answer 1

The 1970's were the correct decade.

Answer 2

The answer is c. 1970.

The Clean Water Act came into force in the decade 1970s. The act is to regulate the discharges of pollutants into the waters and to regulate quality of surface water. The clean water act required industries to reduce or eliminate point source pollution in surface waters.