Lost in the haze

      Haze is traditionally an atmospheric phenomenon where dust, smoke and other dry particles obscure the clarity of the sky. The World Meteorological Organization manual of codes includes a classification of horizontal obscuration into categories of fog, ice fog, steam fog, mist, haze, smoke, volcanic ash, dust, sand and snow.[1] Sources for haze particles include farming (ploughing in dry weather), traffic, industry, and wildfires.

  Seen from afar (e.g. approaching airplane) and depending upon the direction of view with respect to the sun, haze may appear brownish or bluish, while mist tends to be bluish-grey. Whereas haze often is thought of as a phenomenon of dry air, mist formation is a phenomenon of humid air. However, haze particles may act as condensation nuclei for the subsequent formation of mist droplets; such forms of haze are known as "wet haze."

  The term "haze", in meteorological literature, generally is used to denote visibility-reducing aerosols of the wet type. Such aerosols commonly arise from complex chemical reactions that occur as sulfur dioxide gases emitted during combustion are converted into small droplets of sulphuric acid. The reactions are enhanced in the presence of sunlight, high relative humidity, and stagnant air flow. A small component of wet haze aerosols appear to be derived from compounds released by trees, such as terpenes. For all these reasons, wet haze tends to be primarily a warm-season phenomenon. Large areas of haze covering many thousands of kilometers may be produced under favorable conditions each summer.

       Mists, influenza virus, Mycobacterium tuberculosis, and so on, as well as a variety of toxic substances, Pneumococcus, etc., its content is a few times the normal atmospheric water droplets. Compared with the fog, haze on human health hazards. As the haze in the small particles of fine particles in the general diameter of 0.01 microns in diameter, can be directly through the respiratory system into the bronchus, or even the lungs. Therefore, the greatest impact of haze is the human respiratory system, causing diseases mainly in respiratory diseases, cerebrovascular disease, nasal inflammation and other diseases. At the same time, the haze weather, air pressure, air inhalable particulate matter, air mobility is poor, harmful bacteria and viruses spread to the surrounding slow down, resulting in increased airborne virus concentration, the risk of disease transmission is high.

     Today, Shijiazhuang is also a haze days, so the recent implementation of the city's motor vehicle limit line. One to haze days, masks become essential for people's travel goods. Just like our company, we are ready to masks and other protective equipment for our customers who come to visit our maize milling machines today. If you want to come to China, I suggest you add more clothes, because winter is coming in China.