environment

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Across
  1. 1. energy sources you burn
  2. 3. a gas that causes the greenhouse effect, especially carbon dioxide
  3. 4. energy that is produced using the sun, wind, etc
  4. 7. air surrounding the earth
  5. 8. damage caused to water, air... by harmful substances
Down
  1. 2. type of animal or plant
  2. 4. to sort and collect rubbish in order to treat it and produce useful materials that can be used again
  3. 5. animals or plants that may soon not exist because there are very few now alive
  4. 6. the act of sending out gas, heat, light, etc