Across
- 2. when something is harming another thing
- 4. to use something old to make something new
- 6. very big plants that clean the air
- 7. the planet we live on
- 9. a gas that is part of the air
- 10. something that is not dirty
Down
- 1. what we breathe
- 2. when something is thrown away
- 3. the things we throw away
- 5. a special day to do good things for the Earth
- 8. to get something more of