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Last winter , Beijing is completely dominated by the fog and high level of PM2.5.what’s more worse, many provinces in China join in this team of the severe haze weather in 2013 ,including Shandong ,hebei, henan , wuhan and so on.Fog haze weather, causing a large area of low visibility condition in the city.In the morning or at night when relative humidity is larger, forming fog;Rising temperatures, humidity drops during the day, gradually into a haze.Because the haze and mist, dust, flying sand, dust, smoke, such as a weather phenomenon, floating in the air for all the large number of very small dust particles and smoke that effective horizontal visibility to le than 10 km.Sometimes makes meteorological profeionals are difficult to distinguish.Must be combined with the weather background, air condition, air humidity, color, smell and other factors, such as satellite monitoring to comprehensive analysis and judgment, to correct conclusions, and fog and haze weather phenomenon can transform each other sometimes.Through refer to a variety of data, we get that the causing of the haze has the following several aspects: First, The January effect is weaker in the south side of the cold air activities in China, the wind speed is small, stable atmospheric conditions in most regions of middle frequency significantly, easy to cause accumulation of pollutants in the surface layer, resulting in haze weather happens;Second, the fog haze weather nearly stratum atmosphere is more stable, will aggravate the fog haze development, worsen air pollution.Third, involved in urban planning of industrial structure.Coal, automobile, industrial dust, these big pollution emiions, is the root cause of the serious pollution.Fog haze weather formation is not only affected by weather conditions, but also aociated with increased atmospheric pollutants.In such a serious haze weather, We can take measures as follows: One hand, when we encounter haze weather, go out wearing a mask so that we can effectively prevent dust particles into the body, and haze weather not advocating a window ventilated, reopen window is ventilated, such as the sun came out best, we may also keep light diet drink more water in the haze weather.on the other hand , We must actively take measures to prevent the quality of weather become worse.Accelerating the industrial structure and layout adjustment, promoting energy conservation and emiions reduction, construct the ecological civilization.For detailed, we should strengthen air monitor to lower the levels of small particulate pollutants, enact more strict laws and regulations and keep perfecting our current law on environmental protection to regulate people 's daily action and the industrial production and punish those factories that ignore the protection and keep emitting dangerous material that cause haze.then,we should develop green and energy-saving energy to lower the emiion of haze and improve air quality.To my opinion, beautiful environment requires the efforts of everyone, If we all work together to take care of our survival homes ,our environment will getting better and better , we will have the fresh air again, and no longer plagued by haze.