Haze is commonly found in cities, where the economic and social activities of a high-density population emit large quantities of fine particulate matter, and once the emissions exceed the carrying capacity of the atmospheric cycle, the concentration of fine particulate matter will continue to accumulate and appear as haze. Haze is mainly composed of sulfur dioxide, nitrogen oxides and respirable particulates, the first two are gaseous pollutants, the last one particulate matter is to aggravate the haze weather pollution culprits. First: automobile exhaust. Second: Exhaust from burning coal for heating in northern winter. Third: emissions from industrial production. Fourth: dust from construction sites and road traffic. Fifth: oil droplet particles with germs, called growable particles. The particle size of bacteria and viruses is equivalent to PM0.1-PM2.5. When the humidity and temperature in the air are suitable, microorganisms will attach to the particles, especially those of oil smoke, and the microorganisms will be transformed into more microorganisms by absorbing the oil droplets, which will make the growth of biotoxic substances in the haze increase. Lung detoxification is urgent! In recent years, the haze enveloped the country, people’s lungs have become the so-called “vacuum cleaner”. These dirty air is inhaled into the body, some of the polluted particles to take advantage of the opportunity to go deep into the lungs, which buried the health risks.