Across
- 4. over time
- 6. transfer of
- 8. by touch
- 10. electromagnetic waves
- 11. natural heating of Earth
- 12. pollutants
- 13. exerted on the earth
- 14. dust particles
Down
- 1. pollutants emitted directly from an identifiable source
- 2. light bounces back
- 3. reactions
- 5. circulation
- 7. a thin layer of gases that surround the Earth
- 8. human activities
- 9. state of the atmosphere