Across
- 3. energy that can be used for a long time without damage.
- 6. panels devices that change sunlight into electricity.
- 8. energy that comes from the sun.
- 9. machines that produce energy using wind or water.
Down
- 1. energy produced from water.
- 2. energy that does not run out.
- 4. energy from organic materials like plants and waste.
- 5. natural materials people use.
- 7. energy that does not pollute the environment.