If you live in a big city, you must be no stranger to haze. As a newly emerged pollution in recent years, the increasing haze has a great harm to human health. Today, let’s learn together, what exactly is haze, for the skin, and what is the negative impact of haze? It is now well known that haze can cause great damage to the respiratory tract. Small particles of it can be pervasive, entering the body while the whistle system is functioning. As the largest organ of human beings, the skin is also in the process of whistling all the time. Along with the skin’s whistling process, the haze with strong adhesion will also adhere to the skin, thus blocking the pores and causing various skin problems. In addition to visible light, ultraviolet light and infrared light, environmental pollution has ranked third among the sources of skin damage to urban residents. I wonder how much you know about urban skin diseases? When it comes to urban skin diseases, you may associate many of them with the fast-paced urban life, heavy work pressure, irregular work and rest patterns, etc., which can lead to skin metabolic disorders and skin diseases. Undeniably, these factors will indeed accelerate the aging of the skin; but perhaps, you are living in the city has an easy job, pay attention to health and even regular skin care, but recently also feel that the skin is prone to oil, acne, peeling, allergies, as if the skin tone is much darker, even if often go to the beauty salon to do care can not do back to the original fine, smooth, fair skin of their own beauty how you Can accept! In today’s rapid development of industry and transportation, our skin inevitably has to come into contact with the name class of harmful substances in the air, the persistence of hazy weather, is one of the manifestations of environmental pollution haze, refers to the air due to the suspension of a large number of particles and the formation of turbid image. With the deterioration of air quality, the phenomenon of hazy weather has increased and the danger has worsened. Many regions in China have incorporated the hazy weather phenomenon into fog as a catastrophic weather warning forecast, collectively referred to as “hazy weather”. The difference between haze and fog is that the relative humidity is not great when haze occurs, while the relative humidity in fog is saturated (such as the presence of a large number of condensation nodules, the relative humidity may not necessarily reach 100% saturation), the general relative humidity of less than 80% of the atmosphere cloudy field of view blurred visibility deterioration is caused by haze, relative humidity greater than 90% of the atmosphere cloudy field of view blurred visibility deterioration is caused by fog The deterioration of visibility due to haze and fog is caused by a mixture of haze and fog, but the main component is haze. The thickness of haze is relatively thick, up to 13 km, and the distribution of haze particles is relatively uniform, and the scale of haze particles is relatively small, 0.001-10 μm, with an average diameter of about 1 to 2 μm, and the airborne particles are invisible to the naked eye. Since the haze composed of dust, sulfuric acid, nitric acid and other particles scatter more light of longer wavelengths, the haze looks yellow or orange-gray. For example, some emerging cities in the central and western part of China have become a bunch of “new fog cities” after the old industrial city of London because the haze is so severe that the stars are barely visible in the night sky in summer. How does the haze damage the skin – the culprit PM2.5 Haze damage to the skin mainly from the PM2.5, PM2.5 is the ambient air less than or equal to 2.5 microns (μm) in diameter particles, also known as fine particulate matter. The chemical composition of fine particulate matter mainly includes organic carbon (OC) elemental carbon (EC), nitrate, sulfate, ammonium salt, sodium salt (Na) and lead (Pb), copper (Cu), etc.; it is mainly composed of residues emitted during industrial production, daily power generation, and automobile exhaust emissions. PM2.5 as a testing standard was first proposed by the Americans and has now become an important parameter internationally recognized to measure the degree of air pollution. 2011 January 1, China’s Ministry of Environmental Protection issued the “Determination of Ambient Air PM10 and PM2.5 weight method” began to implement, and now PM2.5 has been included in the scope of mandatory monitoring by provinces and cities, requiring testing at any time. Although fine particulate matter is only a small component of the earth’s atmospheric composition, it can have serious adverse effects on human beings because of its small particle size, large specific surface area, easy attachment of toxic and harmful substances (such as heavy metals, disease-causing microorganisms, etc.), ability to stay in the atmosphere for a longer period of time, and long transport distance.