Question

Observation of hydropower energy its impact on environment

Answer 1

Hydropower does not pollute the water or the air. However, hydropower facilities can have large environmental impacts by changing the environment and affecting land use, homes, and natural habitats in the dam area. Most hydroelectric power plants have a dam and a reservoir.

Answer 2

Solution is in image. Just put formula
a3+b3+c3-3abc=(a+b+c)(a2+b2+c2-ab-bc-ca) and put values a=q+r,b=r+p,c=p+q. And you will get answer 8