unit 7 vocab

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Across
  1. 7. pollution control devices
  2. 8. fog or smoke with in a haze made from pollution
  3. 10. a planned fire to strengthen certain trees and plants
  4. 11. water used in an industrial process
  5. 12. making step type slopes for farming crops
Down
  1. 1. the cultivation of a single crop
  2. 2. a section of the ozone layer that was depleated
  3. 3. a micro-organism causing disease
  4. 4. too much grazing causing grassland damage
  5. 5. the discharge of gas
  6. 6. planning and managing people
  7. 9. maximum yield that can be removed over a period of time