Across
- 2. places where people live
- 5. something dirty or harmful to the environment
- 7. clear liquid in rivers, lakes, and seas
- 8. from the sun
- 10. machines with blades that turn to make power
- 12. large natural streams of water
Down
- 1. from moving water
- 3. places where people learn
- 4. flat devices that collect energy from the sun
- 6. to make something less
- 7. from moving air
- 8. to keep something from being lost or wasted
- 9. the gas we breathe, moves to create wind
- 11. where we live
- 13. the star that gives us light and heat