Across
- 3. Measure of how well energy is used
- 8. Energy from the sun
- 9. Solar _______ collect energy from the sun
- 13. Energy from the Earth's heat
- 14. A color often used to describe eco-friendly choices
- 15. Renewable energy helps stop global ______
Down
- 1. Energy from moving air
- 2. Type of energy that can be replenished
- 4. Coal, oil, and gas are all types of ______ fuels.
- 5. Energy from flowing water
- 6. Environmental impact measure
- 7. New energy technology
- 10. Renewable energy is key to a better ______
- 11. Mixed energy sources
- 12. This green water plant can be used as biofuel