Across
- 2. able to be replaced
- 3. wind energy to electricity
- 9. black rock formed from peat
- 10. energy from sun
Down
- 1. layers of gas
- 4. not able to be replaced
- 5. harmful substance in the air soil or water
- 6. warming average temperatures around the world
- 7. matter from planets or animals
- 8. fuel made from biomass