Answer to Question 1
Answer: Any four of the following:
Carbon dioxide (CO2)
Carbon monoxide (CO)
Sulfur dioxide (SO2)
Nitrogen dioxide (NO2)
Ozone (O3)
Hydrocarbons
Particulates
Answer to Question 2
Answer: Body burden is a person's cumulative exposure to and storage of chemicals and other pollutants. It can be assessed through the process of biomonitoring.