Carbon monoxide is particularly harmful because it:
Correct answer: D. Combines with haemoglobin and reduces oxygen transport
- A. Destroys atmospheric ozone directly
- B. Forms heavy particles in sewer air
- C. Causes permanent water hardness
- D. Combines with haemoglobin and reduces oxygen transport
Explanation
Carbon monoxide binds strongly with haemoglobin to form carboxyhaemoglobin, reducing the blood's oxygen-carrying capacity. It is therefore a major health hazard even when it is not readily visible or odorous.
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Environmental engineering examines water supply, water quality, treatment processes, wastewater collection and treatment, solid waste management, air pollution and public health protection. It covers sedimentation, coagulation, filtration, disinfection, biological treatment and disposal methods, while distinguishing drinking-water treatment from sewage treatment and BOD from COD.
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