Across
- 1. Indoor air pollution linked to illness
- 4. A resource that exists in fixed amounts within the Earths crust
- 6. Rocks deposited far from their origins
- 8. The material that is left behind when mining an ore
- 10. Substances that can adversely affect the survival of organisms
- 11. Removal of salt from ocean water to provide freshwater
- 12. A natural resource that can be mined as long as it is profitable
- 13. Held on the surface in lakes, rivers and streams, or in the ground as groundwater
- 14. Productive land becomes desert
- 15. Base of unweathered parent material
Down
- 2. Resources that have the possibility of being used indefinitely
- 3. A layer of crushed sand and stone that naturally accumulates on Earths surface
- 5. Pollutants in the air that become harmful to humans and the environment
- 7. Resources that the earth provides
- 9. Replacement of renewable resources at the same rate at which they are being consumed