What pollutants can copy rooms contribute to?

• A. Ozone
• B. Carbon dioxide
• C. Radon
• D. Nitrogen dioxide

Answer: (A)

Copy rooms can contribute to ozone pollution because many laser printers and photocopiers emit ozone during operation. Ozone is produced by the electrical discharge inside these devices as they interact with air, especially in older equipment. In enclosed spaces, this reactive gas can build up and irritate the eyes, nose, throat, and lungs, making it a notable indoor air quality concern. Modern devices and good ventilation help mitigate this risk. Other options don’t fit because carbon dioxide mainly reflects occupant and equipment presence rather than a byproduct specific to copying; radon comes from soil and building materials; and nitrogen dioxide is typically produced by combustion sources.