Renewable Energy Sources
Across
- 3. Fully developed.
- 5. The basic physical and organizational structures needed for the operation of a society or enterprise.
- 10. The arrival of a notable person or thing.
- 13. Relating to the production of electric current at the junction of two substances exposed to light.
- 15. Limited in size or extent.
- 17. The quality of being inexhaustible; unlimited supply or resources.
- 18. Relating to or resulting from motion.
- 20. A problem or difficulty that must be overcome.
Down
- 1. Relating to or produced by the internal heat of the earth.
- 2. Able to be replenished within a human lifetime.
- 4. Change something radically or fundamentally.
- 6. The state of being free from danger or threat.
- 7. The impact on the environment of human activity in terms of pollution and natural resource depletion.
- 8. Occurring in cycles; recurrent.
- 9. The act of controlling and making use of natural forces or resources.
- 11. Use up the supply or resources of.
- 12. Relating to or affected by tides.
- 14. Sending out light; shining or glowing brightly.
- 16. Make a hole in something with a revolving tool.
- 19. The quality of being intermittent; not continuous or steady.