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.
Answer:
Culture
Explanation:
"Culture" makes people living in a country unique from all the other people in the world. It is <u>a set of shared beliefs and behaviors that a community of people hold dearly. </u>
For example, a<em> "handshake</em>" is a culture in the USA when meeting people for the first time. However, this is not the case in Japan. Japanese people prefer to<em> "bow"</em> when greeting. This clearly shows the differences of countries' cultures.
They are both grasslands.
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Winter consists of cold temperatures and short days. Summer has hot tempatures and long days
Grids and variables are used to find coordinates. Latitude and longitude coordinates