The past 50 years ,China fog and haze overall increasing trend, which showed a reduction in the number
of days of fog, haze days increased significantly, and the persistent haze process increases significantly.
Number of haze days, PRD and Yangtze River Delta region is the fastest growing. The report notes that
increased consumption of fossil fuels, resulting in emissions of air pollutants increased year by year,
is China in recent years, increasing haze weather the most important reason. Air conditioning and
automotive air pollution is the main cause of the temperature rise of metropolitan area. The temperature
rise is because that the humidity of metropolitan area is lower than surrounding suburbs, Suburb plant
acreage is insufficient, the amount of dust increase, and the increase of industrial dust, because the
humidity of metropolitan area is lower, the pressure of surrounding suburbs is higher, dust excretion
is not easy, formed haze. Autumn and winter seasons, the northeast monsoon replace southwesterly
flow, fall and winter temperatures is getting cooler, evaporation of the eastern ocean water, has slowed
down significantly, resulting in drier of the environment, the haze rise.
PM2.5 emission sources from motor vehicles, industry and power plants. Among them, the proportion
of dust emissions and road vehicles was 50%,  industrial emissions was 37% , residents, fossil fuel
combustion and emissions from power plants account for only about 10%. The UNEP report said, PM2.5
concentration of 20 milligrams per cubic meter rise, China and India, there will be approximately 34 million
deaths per year.
Effective air purification 7 Steps

1. coarse filter, air filter larger particles of dust, pollen, etc., to extend the life of the other filters, to
keep the machine stable long-term performance;
2. The high-performance composite HEPA filter layer, isolated dust particles and viruses, fungi, bacteria
throughout the year to produce a variety of planktonic bacteria to be completely suppressed;
3. The activated carbon filters, with high adsorption purification function, can effectively adsorb air
in a variety of harmful chemical substances, effective odor removal, disinfection deodorant;
4. The photocatalyst filter: generate strong oxidation free hydroxyl and reactive oxygen species, have
strong bactericidal, deodorant, anti-mildew, anti-fouling and self-cleaning, air purification function,
will endure;
5. UV ultraviolet: UV radiation, for spores, Chlamydia are killing effect;
6. anion oxygen generator, the release of high concentrations of negative ions, increasing the oxygen
molecules in the air. Negatively charged anion and floating in the air with smoke and dust positively
charged electrode and to the natural deposition. Reduction of pure, fresh natural space.
7. electrostatic dust, electrostatic dust machine will produce negative ions, attached to the dust haze,
plate positively charged, negatively charged the dust haze of adsorption, and thus achieve the effect
of dust.
If the air humidifier installed in the front of air-condition, air-conditioning systems not only can reduce
energy use by up to 50%, furthermore can purify the air, removing dust in the air, and the relative
humidity of indoors, can reach the demand of the most comfortable environment.
Prevention of dust raised their most effective way to reduce emissions in addition to source manufacturing
PM2.5 outside, use water spray to filter and eliminate dust haze is the single most effective method.