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Green Plumbing

Category - Caring for Our Planet

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Which of the following types of renewable energy has the lowest costs for plant operations and maintenance?

Hydroelectric
Solar photovoltaic
Wind
Offshore wind

Explanation

Answer: A -- Hydroelectric generating plants have the lowest costs among renewable energy sources, for combined fixed and variable operations and maintenance, at $10.90 per megawatt-hour (as of 2013).

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