Take the quiz to see if you have understood the concepts mentioned in the slides.
Carbon dioxide
Oxygen
Nitrogen
Sulfur dioxide
Carbon monoxide
Helium
Oxides of nitrogen
Sulfur dioxide
Carbon dioxide
Hydrogen
Nitrogen
Water vapour
0.04%
20%
50%
79%
1%
2%
3%
0.1%
Bird droppings.
Solid rubbish.
Oil spills.
Fumes from vehicles.
Oxygen and rare gases
Nitrogen and oxygen
Nitrogen and carbon dioxide
Oxygen and carbon dioxide