Air and Water

123456789101112131415
Across
  1. 3. carbon dioxide and methane cause this
  2. 4. Incomplete combustion creates this
  3. 5. oil, coal and gas are all....
  4. 6. major cause of acid rain
  5. 7. rust is ...
  6. 8. removes pollutants from exhaust fumes
  7. 11. zinc prevents rust as ..... protection
  8. 12. prevents rust by forming a barrier to oxygen
  9. 14. carbon is released into the atmosphere by combustion and ...
Down
  1. 1. oxygen and nitrogen can be seperated by this method
  2. 2. pollutant that can cause mental retardation
  3. 9. fritz haber invented a process to produce...
  4. 10. nitrogen is an essential component of these biological molecules
  5. 13. main component of the atmosphere
  6. 15. fertilisers contain N, K and ....