Answer:
They usually have steep, sloping sides and sharp or rounded ridges, and a high point, called a peak or summit.peak — the pointed top of a mountain; a mountain with a pointed top. summit — the highest point of something, especially the top of a mountain.
Explanation:
<span>The world in spatial terms. ...Places and regions. ...Physical systems. ...Human systems. ...Environment and society. ...<span>The uses of geography.</span></span>
Can you translate this to English and maybe I can help?
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.
