Environment crossword puzzle

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Across
  1. 3. dioxide Something that we breathe out.
  2. 4. What can you do with paper ?
  3. 5. Something what happents to water when there is plastic Something what floats on water because of people
  4. 7. Something that generates energy.
  5. 8. Something that cant naturally degrade.
  6. 10. Something that can kill you.
  7. 13. A process that can cause heat.
  8. 15. Something that us used up.
  9. 17. Something when people cut trees down.
  10. 18. Something that is used in contstruction and is heavy.
  11. 19. Caused by people and trash.
  12. 20. Toxic metal what was used in piping.
Down
  1. 1. Somwhere where animals live.
  2. 2. Something around where you live.
  3. 6. Something what we need to do to get rid of trash better.
  4. 9. Something that is toxic and is hard to dispose.
  5. 11. Somebody who learns about climate.
  6. 12. Something caused by factorys and people.
  7. 14. Toxic metal used in old thermometers.
  8. 16. Some place where comes greenhouse gasses and bad smell.