The mist is a meteorological phenomenon of fog and haze appearing at the same time. Fog is a common natural phenomena of the weather. Fog itself is not a kind of air pollution and is not the result of air pollution; haze is mainly caused by human emissions of particulate pollutants. The coexistence of common fog and haze, because of diffusion of meteorological conditions of fog, is not conducive to pollutant, making the city's air quality continues to stay low.The symptoms of patients with severe heart and lung diseases will be aggravated if those patients meet with haze pollution. Moreover, healthy people will generally be influenced. Especially, they might catch cardiovascular, cerebrovascular and respiratory diseases.Once affected by Haze, people will suffer varying degrees of damage to their lungs, appearing some symptoms like cough, throat itching, yellow phlegm, asthma and other series of symptoms in different degrees.
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