Across
- 3. colour of the bin for plastic
- 6. what produces the most oxygen
- 7. what keeps different materials from each other
- 10. big wave
Down
- 1. things we can use several times
- 2. poisonous gas
- 4. generating less mess in our life
- 5. colour of the bin for glass
- 8. planet we live on
- 9. colour of the bin for paper