Across
- 2. Production of electricity by water
- 4. Wind or solar power
- 5. energy from the ocean
- 7. Thermal energy in Earth's crust
- 8. Cell producing an electric current
- 9. Reduce the amount of energy used
- 11. Use solar energy that heat a fluid
Down
- 1. Do not deplete natural resources
- 3. Use of the sun's energy for heating
- 6. Prevention of wasteful use of energy
- 10. Plant based material used as fuel