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