Although hydroelectric dams generate electricity without producing greenhouse gases,they __________________
A)contribute only about 5% of the electrical power throughout the world
B)still produce more greenhouse gases per unit of electricity produced than coal power plants
C)can harm aquatic organisms downstream by affecting water temperature
D)cannot provide a consistent supply of electricity during times of naturally low river flow
E)are short -lived structures that have to be rebuilt about every 20 years

Question

Quizplus · Accepted Answer

Hydroelectric dams can harm aquatic organisms downstream by affecting water temperature. While they may not produce greenhouse gases, they still have negative environmental impacts. Option A is incorrect as it is a factual statement unrelated to the negative impacts of hydroelectric dams. Option B is incorrect as hydroelectric dams do not produce greenhouse gases. Option D is incorrect as hydroelectric dams can provide a consistent supply of electricity during times of low river flow with appropriate engineering and management. Option E is incorrect as hydroelectric dams can have a lifespan of up to 100 years or more.

Although Hydroelectric Dams Generate Electricity Without Producing Greenhouse Gases,they __________________