Crossword-Environment

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Across
  1. 4. warming that results when solar radiation is trapped by the atmosphere
  2. 7. pollution of the atmosphere
  3. 8. a gas that contributes to the greenhouse effect by absorbing infrared radiation
Down
  1. 1. undesirable state of the natural environment being contaminated with harmful substances as a consequence of human activities
  2. 2. that can be renewed or extended
  3. 3. pollution of the water in rivers and lakes
  4. 4. an increase in the average temperature of the earth's atmosphere
  5. 5. the totality of surrounding conditions
  6. 6. a layer in the stratosphere that contains a concentration of ozone sufficient to block most ultraviolet radiation from the sun
  7. 9. cause to repeat a cycle