Across
- 4. Energy , energy that comes from the earth.
- 5. , can be replaced in our lifetime.
- 7. , layer of dirt close 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.