There is an urgent need to reduce automobile exhaust or not set off fireworks and firecrackers for the propaganda slogan of preventing haze weather! ! !

With the deterioration of air quality, the phenomenon of increasing haze weather is seriously harmful. Recently, many areas in China have entered the phenomenon of haze weather as an early warning and forecast of disastrous weather. Collectively referred to as "haze weather". In fact, in some ways, its smog weather is very different. For example, when there is fog and the air is humid, the air with haze is relatively dry, and the air is usually in a state of relative humidity less than 60%. The reason is that a large number of extremely fine dust, smoke particles and salt are evenly floating in the air, so the effective horizontal visibility is less than 10KM mixed cavitation. Symbol "∞". Generally not obvious. When there is no big change in air quality, the more stable air mass lasts longer, sometimes lasting 10 days or longer. Haze, fog and haze in the air change every day. Weather phenomena such as sandstorm, sand blowing, sand dust and smoke are all caused by a large number of very fine plankton dust particles or smoke particles. The effective horizontal visibility is less than10km. Professionals in the meteorological department are sometimes difficult to distinguish. The weather background must be comprehensively analyzed and judged in combination with the influence of sky, air humidity, color, smell, satellite monitoring and other factors in order to draw a correct conclusion. Haze weather phenomena can sometimes be transformed. Haze is harmful to human body, and inhalation of respiratory tract will lead to death.