Across
- 4. act of using a resource wisely
- 6. soil that stays frozen most of the time
- 7. to use less of a resource
- 8. huge amount of ice on land
Down
- 1. chemical or soil washed into a body of water
- 2. an area where living & nonliving interact
- 3. chemical spills washed into a body of water
- 5. water that is stored in the soil underground
- 7. to use a resource again for another reason
- 9. environmental protection agency