Across
- 3. Lowest pressure in the atmosphere
- 6. Also known as solar radiation
- 8. Point-source and non point-source
- 10. Meteorites burn up in this layer
- 12. Hurricanes, tornadoes, etc.
- 14. Also known as 'laughing gas'
- 16. Radiation that can cause skin cancer
- 17. Often used in neon lights
- 19. This layer reflects radio waves
- 20. Layer that is the furthest from sea level
- 21. Fog combined with air pollutants
- 22. Used in refrigerants and aerosols
- 23. Air is around 21% made up of this
- 24. Pilots frequently fly up here
- 25. Air is mostly made up of this
Down
- 1. This gas is the most common air pollutant
- 2. Flammable and commonly used as fuel
- 4. This layer contains the weather
- 5. Famously used to fill balloons
- 7. The shell of layered gases around Earth
- 9. Released by evaporation
- 11. Caused by melting glaciers
- 13. Oil and other naturally produced fuels
- 15. Good or bad depending on the layer
- 18. A serious issue in the Amazon