Poor indoor air can be caused by which of the following?

The presence of particulates, combustion gases, and electromagnetic radiation can significantly contribute to poor indoor air quality.

Particulates refer to tiny solid or liquid particles suspended in the air, which can originate from various sources such as cooking, burning fuels, or smoking. These particles can irritate the respiratory system and overall health.

Combustion gases, such as carbon monoxide and nitrogen dioxide, are byproducts of burning fossil fuels for heating, cooking, or other activities. These gases can be particularly harmful, as they can be colorless and odorless, making them difficult to detect without proper monitoring devices.

Electromagnetic radiation, while not a direct contaminant, can affect indoor air quality through the operation of certain appliances that may emit harmful pollutants when malfunctioning or heating up excessively.

In contrast, although humidity and temperature fluctuations, as well as pesticides and cleaning chemicals, can also affect indoor air quality, the unique combination of particulates, combustion gases, and electromagnetic radiation makes that choice particularly significant in discussions about air pollution and health risks in indoor environments. Noise pollution and lighting, while relevant to overall comfort and well-being, do not directly correlate with the chemical aspects of air quality in the same way.