Air pollution
Incomplete combustion                    Complete combustion
Occurs in the presence of not enough    Occurs in the presence of enough
amount of oxygen                        amount of oxygen
Produces carbon monoxide and water      Produces carbon dioxide and water
Carbon monoxide toxic (poisonous)       Carbon dioxide causes global warming
   Pollutant        Sources            Negative effect     Control
Carbon         Incomplete              Toxic           Catalytic
monoxide (CO) combustion of            (poisonous)     converter
               hydrocarbons
               fuels
Carbon dioxide Complete                Global warming
(CO2)          combustion of
               hydrocarbons
               fuel
Sulfur dioxide Burning fuel             Respiratory       Remove sulfur
(SO2)          containing                problems          from fuel
               sulfur)                  Acid rains
Nitrogen       Reaction of              Respiratory       Catalytic
oxides (NO     nitrogen with             problems          converter
and NO2)       oxygen of the            Acid rains
               air in the high
               temperature
               engine
Soot           Incomplete              Asthma
               combustion of
               hydrocarbons
               fuels
                            Acid rains
Sources                           Negative effect
Acidic gases (sulfur dioxide         Damage plants (trees)
and nitrogen dioxide)                Make soil and small water
                                       area more acidic
Control the acidity of soil and water
   Neutralization of acid in soil and water by adding calcium
    carbonate.
Catalytic converter
   Treat exhaust gases from vehicles to reduce pollution
   Converts carbon monoxide into carbon dioxide and nitrogen oxides
    to nitrogen gas.