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Introduction In this case study I will be investigating whether traffic pollution causes asthma. There are many for's and against this statement. I will also be talking about how you can reduce air pollution. Asthma is a disease that affects your airways. Airways are the tubes that carry air in and out of your lungs. If you have asthma, the inside walls of your airways are swollen. What is air pollution? Air pollution is the presence of noxious substances in the air that we breathe. The air is filled with chemical substances and air pollutants which usually come from cars, industries and trucks. They pollute the air by refueling cars, manufacturing and oil refining. There are two types of pollutions: Secondary and Primary. Primary pollution is emitted straight into the air and secondary pollution comes from chemical reactions between pollutants in the atmosphere. Five examples of pollutants are: Sulphur Dioxide (SO2) Carbon Monoxide (CO) Nitrogen Dioxide(NO2) Ozone (O3) Hydrocarbons Sulphur dioxide...

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