The sources of that/those type(s) of pollution (where does air pollution most occur)
There are many sources of air pollution. Some are stationary like power plants and others are mobile like cars.
The effects of the pollutant on the environment
There are many bad effects: pollutants cause health problems for people living nearby. CO2 causes green house effect and global warming. SO2 causes acid rain.
The effects of the pollutant on human health
Pollutants are bad - make you sick when they get inside your lungs. cause asthma attacks. lead in air makes you stupid.
Ways we can reduce the amount(s) of that/those pollutant(s) generated
Switch to renewable energy, drive less in cars with better gas mileage.