Across
- 4. ways to protecting our resources
- 7. soil that is made from decomposed organic matter
- 8. a nonrenewable resource that comes from dead animals over millions of years
- 9. takes millions of years and cannot be replaced in our lifetime
- 10. toxic substances from burned fossil fuels that cause the air to be harmful
- 12. a clean energy resource
Down
- 1. to use less of something
- 2. to use again
- 3. a nonrenewable resource that comes from dead plants over millions of years
- 5. resources that come from nature
- 6. to make something new of an existing material
- 11. resources that can be replenished quickly