The recent haze weather

A smog consists of sulfur dioxide, nitrogen oxides and inhalable particles. Although nose hair can block some inhalable particles, gaseous sulfur dioxide and nitrogen oxides can't. So A is wrong, which is in line with the meaning of the question.

B in foggy days, dust and smoke are floating in the air, and they may be suspended in the fog. Every time a person breathes, about 500,000 particles are inhaled into the depths of the lungs, but in polluted air, the inhaled particles may be 100 times more than this. Bronchus and alveoli can not effectively remove tiny particles in smog. So B is correct, and it doesn't fit the question.

C. Particulate pollutants in the smog air will not only cause myocardial infarction, but also cause myocardial ischemia or injury. Common respiratory diseases such as emphysema, asthma, bronchitis, rhinitis and upper and lower respiratory tract infections may also be caused by foggy days. Toxic particles in haze days are also an important cause of cardiovascular diseases. So c is correct and doesn't fit the question.

D, the formation of haze weather is mainly human combustion activities, coal from industrial production, automobile exhaust, burning straw, will be produced. So d is correct and doesn't fit the question.

So choose: a