Across
- 2. replacement of renewable resources at the same rate they are being consumed.
- 8. found on earth's surface.
- 9. removing of salt from ocean water.
- 11. Productive land becomes desert.
- 12. natural resources that can be mined.
- 14. indoor air pollution linked to illness.
- 15. Rocks deposited far from their origins.
Down
- 1. pollutant in the air that becomes harmful.
- 3. resources that exist in fixed amounts.
- 4. material left behind.
- 5. bade of unsheathed parent material.
- 6. layer of crushed sand and stone.
- 7. held on the surface in lakes, rivers, and streams.
- 10. Resources that the earth provides.
- 13. substances that adversely affect the survival of organisms.