Across
- 2. substance that pollutes something especially water or the atmosphere
- 3. process of removing salts or other minerals and contaminants from seawater, brackish water, and wastewater effluent
- 5. commercially valueless material in which ore is found
- 8. extraction level of the resource which does not exceed the growth
- 9. water containing less than 1000 miligrams per liter of dissolved solids,most often salt
- 10. naturally occurring solid material from which a materiel or valuable mineral can be profitably extracted
- 13. biomass energy such as ethanal,hydropower,geothermal power,wind energy,and solar energy
- 14. rock or bolder that differs from the surronding rock brought from a distance by glacial action
Down
- 1. oil,natural gas and nuclear energy.
- 4. contamination of the indoor or outdoor environment by any chemical,physical, or biological agent that modifies the natural characteristics of the atmousphere
- 6. raw materials that are produced from natural sources and extracted from pits and quarries,include gravel,crushed stone,and sand
- 7. raw materials and sources of energy that we use
- 11. land degradation in arid,semi arid,and dry sub humid areas
- 12. solid rock underlying loose deposits such as soil or alluvium