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