The damage of PM2.5 to respiratory system and cardiovascular system mainly includes respiratory irritation, cough, dyspnea, decreased lung function, aggravation of asthma, and premature death of patients with chronic bronchitis, nonfatal heart disease and cardiopulmonary disease.
PM2.5 pollution source
Particulate matter in the air comes from all aspects of urban life. As early as 2000, Grace Wai Wong of china environmental science Research Institute published a study on the pollution status and characteristics of PM2.5 at that time. This study pointed out that taking Beijing as an example, urban PM2.5 mainly comes from motor vehicle emissions; Followed by coal burning, especially heating in winter, industrial emissions have little impact. In 2006, Grace Wai Wong once again added that the main sources of PM2.5 in Beijing also include construction dust, dust and organic pollution.
Another study shows that 90% of indoor PM2.5 comes from human activities. Among them, smoking and smoke particles attached to the surfaces of furniture and clothes are the main sources. When people are active, such as making beds, these particles will rise due to air flow and be inhaled into the lungs.
People's Daily Online -PM2.5 has changed our lives: How to prevent PM2.5?