Across
- 2. round planet where we live
- 4. chemicals or trash that make the Earth dirty
- 5. to use something again
- 6. turning the materials from trash into something new
- 8. help clean the air
- 9. a color that means earth friendly
Down
- 1. to use something less
- 3. trying to protect or preserve something
- 7. trash that people leave on the ground