Imagine hearing on the radio that the local weather agency has declared a high pollution advisory. what are the health risks of high concentrations of air pollution and what can be done on an individual basis to prevent or reduce problems associated with air pollution?

The risks are high. You will develop headaches, dizziness. The worst is heart disease and lung cancer from the chemicals. Stop driving cars. They excrete the chemical Carbon Monoxide, Sulfur dioxide. The factories also cause this. Which make nitrogen oxide and methane. We can stop making these car and factories to help us breathe.  

Explanation:

well there will be more birth defects the pollution could cause cancer 

and to reduce or prevent the problems of pollution people could wear Masks 

and stop the thing making pollution