Which of the Following Is NOT an Advantage Associated with Hydroelectric

question 13

Multiple Choice

Which of the following is NOT an advantage associated with hydroelectric dams?

• A) the amount of electricity can be changed rapidly
• B) there are no emissions of greenhouse gases or toxic contaminants
• C) the dam traps sediment that otherwise would be transported down the river
• D) the main source of energy, gravity, is free

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