What is carbon monoxide?

What is carbon monoxide?

• A. A colorless, odorless, and poisonous gas (indoor air pollutant) that is classified as an asphyxiant.
• B. A colorless gas with a strong odor.
• C. A beneficial gas for indoor air quality.
• D. A greenhouse gas.

Answer: (A)

Carbon monoxide is a colorless, odorless, poisonous gas that makes indoor air unsafe and can act as an asphyxiant. It’s dangerous because it binds to hemoglobin in the blood far more readily than oxygen, forming carboxyhemoglobin and reducing the blood’s ability to deliver oxygen to tissues. Since it has no smell or visible signs, people can be exposed without realizing it, especially in enclosed spaces with incomplete combustion or poor ventilation. Common indoor sources include faulty furnaces, gas or wood stoves, space heaters, and vehicles running in attached garages. The key safety takeaway is to have functioning carbon monoxide detectors, ensure proper ventilation, and regularly service heating and fuel-burning appliances to prevent buildup.

Carbon monoxide is a colorless, odorless, poisonous gas that makes indoor air unsafe and can act as an asphyxiant. It’s dangerous because it binds to hemoglobin in the blood far more readily than oxygen, forming carboxyhemoglobin and reducing the blood’s ability to deliver oxygen to tissues. Since it has no smell or visible signs, people can be exposed without realizing it, especially in enclosed spaces with incomplete combustion or poor ventilation. Common indoor sources include faulty furnaces, gas or wood stoves, space heaters, and vehicles running in attached garages. The key safety takeaway is to have functioning carbon monoxide detectors, ensure proper ventilation, and regularly service heating and fuel-burning appliances to prevent buildup.