Across
- 4. Resources the earth provides
- 5. removing of salt from groundwater found in aquifers
- 8. Base of unweathered parent material
- 9. Rocks deposited far from their origins
- 10. indoor air pollution linked to illness
- 12. Material left behind while mining ore
- 13. Resources within the earth that might be able to be used indefinitely
- 14. A natural resource that can be mined
- 15. pollution pollutants in the air that become harmful to humans and the environment
Down
- 1. When productive land becomes desert
- 2. The replacement of renewable resources at the same rate their being used
- 3. A resource that exists in fixed amounts
- 6. Substances that can adversely affect the survival rate of organisms
- 7. held on the surface of earth in either lakes, rivers, streams,or ground water
- 11. layer of naturally crushed sand and stone the naturally accumulates on or near earths surface