Across
- 1. Flammable Gas
- 3. Third most abundant Gas
- 5. Most abundant gas in the atmosphere
- 6. Above the stratosphere
- 9. Earth heating itself up
- 11. Hottest layer of the atmosphere
- 12. Produced during photosynthesis
- 13. Trash scattered around the environment
- 14. When regions weather changes
- 16. Keeps our planet the perfect temperature
- 17. The outermost region of the atmosphere
- 18. Second major layer
Down
- 2. High concentration of atoms
- 4. People use as fuel
- 7. Produced during burning of fossil fuels
- 8. Process of Carbon naturally interchanging
- 10. Most dense layer in the atmosphere
- 15. The process of removing trees