Question

*___________ air pollutants reduce the oxygen holding capacity of the blood.*

1️⃣ Carbon monoxide
2️⃣ Sulphur dioxide
3️⃣ Methane
4️⃣ Nitrous oxide​

Answer 1

Carbon Monoxide (CO)

When inhaled it reduces the oxygen carrying capacity of the blood to the body's organs and tissues and may especially affect people with heart or circulatory disease.