Answers

2014-09-19T18:55:22+05:30
In petrol fumes, there are,carbon monoxide,
carbon dioxide,
nitrogen oxide,
nitrogen dioxide,
soot,oil vapor,&lead. Others are:- smog (fog+smoke) (can be occasional, found in the atmosphere),CFCs (Chlorofluorocarbons ), produced by aerosol sprays and air conditioner coolants,Sulphur dioxide,Suspended particulate matter(SPM),
fungal spores,
bacteria, virus,
pollen grains,
silicon dioxide,
hydrocarbons,
lead halides particulate matter,
polynuclear aromatic compounds and polunuclear aromatic compounds(hydrocarbons),
asbestos particles, etc.

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2014-09-19T19:56:36+05:30
The major components are the 
argon 
carbon oxide (CO 2 )
but there are more  components such as 
methane 
propane 
ethane 
also there are many gases that are till not known
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