What is considered a common contributor to poor indoor air quality?

Carbon monoxide is a well-known contributor to poor indoor air quality due to its toxic nature and the fact that it is colorless and odorless, making it particularly dangerous. It is produced by the incomplete combustion of fossil fuels, which can occur from devices such as gas appliances, engines, and heaters. When these appliances are not well-ventilated or maintained, carbon monoxide can accumulate indoors, leading to potential health risks such as headaches, dizziness, and in severe cases, even death.

In contrast, natural light, open windows, and fresh air ventilation generally promote better indoor air quality by supporting air circulation and reducing the concentration of indoor pollutants. Natural light can help improve mood and well-being but does not directly affect air pollution levels. Open windows can allow for fresh air to enter, which is beneficial unless outdoor air quality is compromised. Fresh air ventilation is critical in diluting indoor contaminants and ensuring that indoor air remains safe and healthy to breathe.