At present, domestic regarding the health effects of PM2.5 findings consistent with the developed countries. China has between PM2.5 and health-related ecological research and intervention studies, but the lack of standard-setting is most useful for a prospective cohort study. In ecological research, in 1993-1997, the two scholars to cooperate in Guangzhou, Wuhan, Lanzhou, Chongqing and other cities to carry out a cross-sectional survey. It was found that the prevalence of PM2.5 and children with chronic respiratory disease and lung function decline was linear, positive correlation is much greater than the impact of PM2.5, sulfur dioxide and nitrogen dioxide. Thereafter air purifier supply, time-series studies Beijing, Shanghai, Guangzhou and other cities considered air purifier which is good, PM2.5 exposure did increase the risk of mortality and morbidity of urban residents. Found that China PM2.5 in large component of health hazards from fossil fuel combustion by-component analysis. Indoor air pollution is not only caused by the dust of itself, as well as its attachment feature. Indoor air pollutants include cooking fumes, smoke fumes, furniture release of toxic chemicals, harmful substances produced by household appliances, bacteria and microorganisms and other air purifiers recommended, and the dust is the carrier of all these substances. Dust carrying these substances into the human body, can cause a variety of diseases, such as cancer-causing incomplete combustion of fine particles for cancer incidence planted the "curse"; decoration left heavy metals and chemicals into the human body easily cause disease; bacteria, viruses attached to the dust, as the spread of the disease has left a "hidden." Air purifier which is good, Nanjing air purifier, good new environment provided by the Nanjing Yat Yat good new Environmental Technology Limited. Good New Plaza Nanjing Environmental Monitoring Technology Co., Ltd. (www.hxy880.com) strong, credible, in Nanjing of environmental monitoring equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving good innovative ideas will lead the new Plaza environmental testing into the brilliant and you work for a better future!