Energy sources

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Across
  1. 2. energy sources come from natural elements
  2. 6. energy formed from natural proccess
  3. 7. one of the four fundamental states of matter
  4. 8. gasses that absorb radiant energy
  5. 10. source stored energy sources.
  6. 12. energy, limited energy sources
  7. 13. black rock
  8. 15. power derived from the energy of falling or fast-running water
Down
  1. 1. related to acid rain
  2. 3. discharge of gas
  3. 4. source natural sources in the environment.
  4. 5. contaminates environment
  5. 9. extraction of minerals.
  6. 11. source of power.
  7. 14. slippery liquid substance