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CO is a more harmful pollutant because it ______.
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A
has more affinity for haemoglobin
💡 Explanation:
Carbon monoxide (CO) is highly toxic because it binds to hemoglobin with approximately 240 times greater affinity than oxygen. This forms carboxyhemoglobin, reducing the blood's oxygen-carrying capacity and causing tissue hypoxia. CO does not react quickly with UV radiation (B), nor does it cause ozone depletion (D). Option C is factually opposite to the truth.