CLIMATE CHANGE

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Across
  1. 3. Car ownerships has greatly increased in this country.
  2. 5. When trees are burned to clear the forest it releases CO2.
  3. 7. A gas that comes from car exhausts?
  4. 9. What gas is released from belching cattle?
Down
  1. 1. Created over millions of years by decaying organic material.
  2. 2. This gas is known as CO2.
  3. 4. Methane is released when rubbish decays at this site.
  4. 6. Cutting down trees is called ...........
  5. 8. Methane is how many times more efficient than CO2 at trapping heat from the sun?