Which of the following is not an impact associated with the use of hydroelectric energy?

a.

release of contaminants

b.

interruption of natural water flow

c.

increase of riverbed erosion

d.

disruption of aquatic wildlife

The correct answer is a. release of contaminants

If you produce hydroelectric energy, you disrupt the water flow by building dams and power-plants, which also disrupts the aquatic wildlife that inhabits those areas. This also increases riverbed erosion because the water is accumulated and reaches further into the shore.