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