Across
- 2. Increase earth's temperature
- 6. Particles produced because of combustion
- 8. Produced by burning fossil fuel
- 9. Fuel that contain more carbon does...
- 10. The removal of sulfur dioxide
Down
- 1. A device for converting polluting exhaust gasses
- 3. Layer around the earth
- 4. Polluting
- 5. Chemical process done by plant
- 7. Contamination of outdoor environment