Across
- 3. carbon dioxide and methane cause this
- 4. Incomplete combustion creates this
- 5. oil, coal and gas are all....
- 6. major cause of acid rain
- 7. rust is ...
- 8. removes pollutants from exhaust fumes
- 11. zinc prevents rust as ..... protection
- 12. prevents rust by forming a barrier to oxygen
- 14. carbon is released into the atmosphere by combustion and ...
Down
- 1. oxygen and nitrogen can be seperated by this method
- 2. pollutant that can cause mental retardation
- 9. fritz haber invented a process to produce...
- 10. nitrogen is an essential component of these biological molecules
- 13. main component of the atmosphere
- 15. fertilisers contain N, K and ....