Across
- 4. some examples are wind, solar, and water
- 5. to make dirty
- 6. rotting done by plants or animals
- 7. power coming from the sun
- 9. energy sources made from ancient plant and animal remains
Down
- 1. colorless, odorless gas used by plants to create their own food
- 2. anything that can be burned to create heat or energy
- 3. rotating magnetic device that creates electricity
- 8. involving areas and peoples all over the world