RENEWABLE ENERGY SOURCES

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Across
  1. 3. Eco-friendly energy descriptor
  2. 5. Converts wind to electricity
  3. 8. Sustainable energy type
  4. 9. Ocean energy type
  5. 10. A biofuel source
  6. 13. Long-term viable energy
  7. 15. Energy from the sun
Down
  1. 1. Heat from beneath the Earth's surface
  2. 2. Energy from flowing water
  3. 4. Energy from organic materials
  4. 6. Biofuel from crops
  5. 7. Pollution-free energy
  6. 11. Turbine-powered energy source
  7. 12. Solar device component
  8. 14. Energy from ocean waves