Energy Crossword

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Across
  1. 7. this gas is released when coal burns
  2. 8. highest grade of coal
  3. 10. accounts for 19% of Ecuador's energy use
  4. 11. provide 80% of the world's energy
  5. 13. most used energy source in Ecuador
  6. 14. an energy source that can be replenished
Down
  1. 1. Ecuador exports most of its oil to this country
  2. 2. energy in a transformed state
  3. 3. country that uses the most amount of energy
  4. 4. country with biggest oil reserves in the world
  5. 5. sector where most energy is used in the US
  6. 6. a solid, black rock that is highly combustible and made from organic matter
  7. 9. source that uses the ocean tides to generate energy
  8. 12. the ability to do work
  9. 15. main source of energy in the US until 1850