Across
- 4. Energy sources which can be used over and over again without running out
- 6. Turning used items into new
- 7. Energy that comes from the sun
- 8. Anything that dirties the earth
Down
- 1. Are naturally found on earth
- 2. When everyone put together uses less resources than the earth produces
- 3. Either can be used up or do not replace themselves
- 5. The layer of dirt closest to the surface of the earth