cross word puzzle

Edit Answers
123456789101112131415
Across
  1. 2. coal
  2. 4. gobal warming
  3. 5. greenhouse effect
  4. 8. geothermal
  5. 12. natural sources
  6. 14. hydropower
  7. 15. biomass
Down
  1. 1. natural gas
  2. 3. solar
  3. 6. nucelar
  4. 7. oil
  5. 9. human caused sources
  6. 10. greenhouse gas
  7. 11. climate change
  8. 13. wind