natural resources

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