Across
- 3. - Replenishable energy sources
- 5. - To lessen
- 6. - Energy from moving air
- 10. - Our planet
- 12. - A time after the present
- 13. - Meeting needs without harming future
- 16. - Harmful contamination
- 17. - Energy from Earth's heat
- 18. - The natural world
Down
- 1. - Machines that convert kinetic energy into electricity
- 2. - The capacity to do work
- 4. - Another term for sustainable
- 7. - Effect
- 8. - Environmentally friendly
- 9. - Devices that convert sunlight into electricity
- 11. - Power generated from water
- 13. - Origin of energy
- 14. - Energy harnessed from the sun
- 15. - Organic matter used for energy
- 16. - The ability to do work