Saving the Environment

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Across
  1. 3. they harm the ozone layer in the atmosphere
  2. 8. less than 1% of the earth's atmosphere
  3. 9. one of the harmful changes that occurs in the environment due to human activities
  4. 10. chemical compounds that are used to kill pests
Down
  1. 1. the long term warming of the earth's overall temperature
  2. 2. the condition one lives in
  3. 4. the gaseous phase of water
  4. 5. all organisms that grow and live in the wild
  5. 6. being or containing an acid
  6. 7. substance or energy introduced into the environment