ENERGY EFFICIENT

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Across
  1. 2. An adjective of "the sun"
  2. 4. A country's __________ are the natural deposits it has
  3. 6. This term refers to gas,coal,oil,...
  4. 8. Prefix that goes with water
  5. 13. Fuel sources that won't run out
  6. 14. The amount of carbon that is released into the environment
  7. 15. Causing little or no damage to the environment
  8. 19. A different option
Down
  1. 1. We put this in our vehicles to fuel them
  2. 2. Toxic gases from cars which aren't good to breathe in
  3. 3. Biofuels are more ...-friendly than fossil fuels
  4. 5. Demand for ...-friendly is rising
  5. 7. A battery that can be reused
  6. 9. To totally use up
  7. 10. Most UK household electricity is used for this
  8. 11. Able to recycle
  9. 12. To use fuel, energy or time in large amounts.
  10. 16. A type of petrol with the lead taken out
  11. 17. The power produced from the nucleus of an antom
  12. 18. To produce energy