The Chinese capital has suffered from serious air pollution for many years. Primary sources of pollutants include exhaust emission from Beijing's more than five million motor vehicles, coal burning in neighbouring regions, dust storms from the north and local construction dust. A particularly severe smog engulfed the city for weeks in early 2013, elevating public awareness to unprecedented levels and prompting the government to roll out emergency measures.
Beijing is only one of the city suffers from air pollution. To protect you and your family from the smog all the time, you need a air purifier that you can take everywhere, such as BIGWHITE, they have air purifier like necklace. So you can wear it and protect you at the same time.