Name a common source of indoor air pollution.

Tobacco smoke is a well-recognized common source of indoor air pollution. When tobacco products are burned, they release a complex mixture of chemicals, including more than 7,000 compounds, many of which are toxic and can adversely affect indoor air quality. These pollutants can linger in the air and settle on surfaces, leading to long-lasting exposure for occupants, even long after smoking has ceased.

Tobacco smoke contains harmful substances such as particulates, carbon monoxide, and formaldehyde, all of which can contribute to respiratory problems and other health issues, particularly for vulnerable populations such as children, the elderly, and those with pre-existing health conditions. Furthermore, tobacco smoke can lead to the buildup of secondhand smoke, which poses health risks to non-smokers.

While dust mites, radon, and pesticides can also contribute to indoor air pollution, tobacco smoke stands out for its widespread presence in homes and its associated health risks, making it a significant concern in discussions about indoor air quality.