• Air pollution is due to chemical substances and particles released into the air mainly by human actions.
  • Indoor air pollutants include both chemical and biological pollutants.
  • Chemical pollutants include radon gas, carbon monoxide, and volatile organic compounds.
  • Biological sources of air pollution include molds, pollen, and pet dander.
  • Use the resource below to answer the questions that follow: How does the way most Americans spend their time make indoor air quality a pertinent health concern?
  • What other countries do you think share this problem?
  • Give three examples of pollutant sources.
Select from the frequently asked questions below.