Across
- 3. Rocks deposited far from their origins
- 5. Pollutants in the air that become harmful to humans and the environment
- 7. A substance that adversely affect the survival of organisms
- 8. Water on the surface in lakes, streams, etc.
- 9. Removing salt from ocean water to make fresh water
- 10. A finite resource that cannot be replaced
- 12. Ground parent rock
- 13. A layer of crushed material on or near Earth's surface
- 15. Indoor air pollution linked to sickness
Down
- 1. When productive land becomes desert
- 2. Resources that the Earth provides
- 4. The replacement of resources at the same rate they're being used
- 6. Resources found on the Earth's surface that can be replaced with human efforts
- 11. A base of unweathered parent material
- 14. A natural resource that can be mined as long as it is profitable