Across
- 1. may be dangerous to birds
- 3. power that's free and produces no greenhouse gas
- 6. fuel that comes from once living things
- 7. efficient washing machines run by wind or solar
- 9. a disadvatage is not available during rain
- 10. free, renewable resource as it flows
Down
- 2. examples are wind and sun
- 4. resource from within the Earth
- 5. emits smoke and chemicals when burned
- 8. cannot be easily replaced