human impacts on the environment vocab quiz

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Across
  1. 3. introduction of harmful substances
  2. 5. the science or practice of farming
  3. 8. the amount of greenhouse gases produced by one person
  4. 9. a species facing extremely high risk of becoming extinct
  5. 11. making sure we use resources at a proper rate
  6. 12. the using up of a resource
Down
  1. 1. the act of clearing a wide area of trees
  2. 2. long term shifts in global climate
  3. 4. making an area more like a city
  4. 6. natural habitats are eliminated
  5. 7. the protection of resources
  6. 10. restoring land to its natural habitat