Across
- 3. relating to or denoting the generation or electricity using flowing water
- 6. it uses wind to make electricity
- 7. gaseous fuel, especially methane, produced by the fermentation of organic matter
- 8. the action of circling around
Down
- 1. increase in the rate of speed
- 2. relating to the sun
- 4. black or dark brown rock
- 5. the ability to do something