Power Up: Alternatives to Fossil Fuels
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Nuclear power plants do not release air pollutants but may emit dangerous radioactive materials. Hydroelectric plants generate no pollutants, but dams affect river systems. Solar energy collectors... (more info)

Nuclear power plants do not release air pollutants but may emit dangerous radioactive materials. Hydroelectric plants generate no pollutants, but dams affect river systems. Solar energy collectors generate no pollutants but work only when the sun is out.

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