Concentrations of indoor air pollutants, such as formaldehyde and asbestos, are generally greater than concentrations of the same pollutants found outdoors. Which of the following is the best explanation?
A)
There are more sources of air pollution outdoors.
B)
Insulating buildings to conserve energy causes indoor pollution.
C)
Smoking is the major source of indoor air pollution and is highly concentrated.
D)
There is no air movement indoors.
