Across
- 1. energy from water
- 3. unattractive
- 4. garbage
- 5. not inexpensive
- 6. hydropower source example
- 7. oldest source of renewable energy
- 9. not complicated
- 11. first
- 14. connected to water
- 15. never runs out
Down
- 2. in the sea
- 3. everywhere, or everybody
- 8. southernmost European country
- 10. made us of
- 12. ocean in the middle of the ring of fire
- 13. without stopping