Across
- 7. protects us from the radiation from the sun
- 9. caused by too many people reproducing
- 10. innermost layer
- 11. cause of greenhouse effect
- 12. found in small quantities in the atmosphere
- 13. gas used for pain relief
- 14. 21% of the atmospheric gases
Down
- 1. caused by humans littering in the water
- 2. caused by burning of fossil fuels
- 3. majority of atmospheric gases
- 4. harmful gas
- 5. affect of greenhouse effect
- 6. majority of greenhouse gases
- 8. outermost layer
- 12. middle layer