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  1. Hydroelectric Energy - National Geographic Society

  2. Hydroelectricity - Wikipedia

  3. Hydropower Basics | Department of Energy

  4. How Hydropower Works | Department of Energy

  5. Hydroelectric power | Definition, Renewable Energy, Advantages ...

  6. Hydroelectric Power: How it Works | U.S. Geological Survey - USGS.gov

  7. Hydroelectric Energy: The Power of Running Water

  8. Hydropower explained - U.S. Energy Information Administration

  9. Hydropower - IEA - International Energy Agency

  10. Hydropower facts and information - National Geographic