Select all the potential effects of damming a river.

a. increased erosion

b. increased water reserves

c. disruption of river ecosystems

d. increased pollution of watersheds e. increase production of electricity

f. higher amounts of algae from fertilizer runoff

Many people are in favor of the dam. Hydroelectric power is not as polluting

as other forms of electrical generation. The country is growing quickly, and

its economy is growing. The country must be able to produce more electricity

to meet everyone's needs. However, those opposed say the dams will force

many out of their homes. It will destroy an important wilderness area, and may

damage ecosystems - especially river or fjord ecosystems in Patagonia, since

silt won't be carried down rivers. Many also say that the project helps the

copper mining industry, and they believe that this project will benefit

businesses, not the people of Chile

do you have a formula possibly