The atmosphere of industrial area loaded with chimines is considered harmful to health because:

Respiratory System Physiology Mcqs

A.There is more and more carbondioxide
B.There is carbonmomonoxide which can bind with Hb 230 times more than oxygen and its pressure of about 0.7 mm Hg is lethal
C.There is more water vapour which makes breathing difficult
D.The air has very low percentage of oxygen

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