Across
- 4. Energy , energy that comes from the sun.
- 5. , can be replaced more than once.
- 7. , a layer of dirt closest to the surface of the earth.
- 8. Resources , naturally found on earth.
Down
- 1. , used items into new items.
- 2. , anything that dirties the earth.
- 3. , everyone put less things than the earth.
- 6. can't be replaced quickly enough to be replaced .