Across
- 2. to process materials for reuse
- 5. pollution harmful substances in the air
- 8. the process of reusing materials
- 10. able to continue without harming nature
- 12. dirty or harmful substances in the environment
- 13. to use something again
- 14. effect trapping of heat in the Earth's atmosphere
Down
- 1. waste material thrown away
- 3. the natural world around us
- 4. cutting down of forests
- 6. energy energy that comes from natural sources and doesn't run out
- 7. warming increase in Earth's average temperature
- 9. to make something smaller or less
- 11. change long-term change in global weather patterns