Hydropower 3242020 response summary for evaluating

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3/24/2020 Response Summary for Evaluating other energy sources 3/3 17: Explain your answer. Hydropower has a large ecological impact on its surroundings. Rivers are dammed up preventing the free migration of fish species up- and downstream. 18: Why is it beneficial to have many different sources for electricity generation, even though some sources are quite inefficient in some respects (as biofuels)? Relying on more than one option as a source is better for Earth than relying on a single resource for electricity generation. 19: Which energy source used to generate electricity in the United States is most efficient? hydropower 20: Explain your answer. Hydropower is the most efficient power source. It has the lowest cost per unit. 21: How certain are you about your claim based on your explanation? (3) 22: Explain what influenced your certainty rating. I'm not sure how the cost of other sources are measured so I can't be sure about my claim unless I have more data to support that.
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