Climate change

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Across
  1. 5. White bears that live in the polar ice caps.
  2. 7. Emit heat.
  3. 8. A thing you use to get warmer or cover a bed.
  4. 12. The planet which humans live on.
  5. 13. The increase in Earth's average temperature over a period of time.
  6. 14. Dying from suffocation underwater.
  7. 17. The way heat gets trapped in the earth's atmosphere.
  8. 19. Not guessable.
  9. 20. A profession where humans study earth and other things.
Down
  1. 1. Very often.
  2. 2. A place where animals live that have the best conditions for them.
  3. 3. Total of all heat and greenhouse gas emissions.
  4. 4. Prevent something from escaping.
  5. 6. Produces oxygen.
  6. 9. Complete dying out of a species.
  7. 10. A bird that lives on the polar ice caps.
  8. 11. A source of energy that comes from the earth.
  9. 15. To conceal something by putting something on it or in front.
  10. 16. A type of gas that factories and cars produce.
  11. 18. To dissolve.