Across
- 5. pollutants in the air that are harmful
- 12. purifying ocean water
- 13. minnerals or substances that are not man made
- 14. a reacource that can be reused
Down
- 1. solid rock
- 2. a resource that does not need grow
- 3. the rock surrounding valuable materials or minerals
- 4. building syndrome sickness among occupants in a building
- 6. harming the environment
- 7. a whole formed from combining elements
- 8. a rock or bolder that differs from surrounding rocks
- 9. a resource that CAN'T be reused
- 10. water that contains only minimal quantities of dissolved salts
- 11. a natural minneral
- 12. land becomes desert by drought