Living in the Environment 18th Edition by Tyler Miller,Scott Spoolman

تمرين 11

What is the key concept for this section What is the major indoor air pollutant in many less-developed countries What are the top three indoor air pollutants in the United States Give three reasons why they present a serious threat to human health. Explain why radon-222 is an indoor air pollution threat, how and where it occurs, and what can be done about it.