Getting to know PM2.5

PM2.5 is a simple number, refers to the diameter of particles less than or equal to 2.5 microns, but once associated with atmospheric pollution, it can not help but let a person fear, because people live in the atmosphere surrounded by the atmosphere, breathing the atmosphere at all times, the quality of the atmosphere is directly related to the quality of life; atmospheric pollution is the body pollution, the body contamination is a hundred diseases. 

Why is PM2.5 so closely related to human health and so feared? Because it is ‘relentless’ and ‘pervasive’. Its diameter is less than 1/20 of the thickness of a human hair, which is rich in a large number of toxic and harmful substances, especially heavy metals, they breathe, can be free to come and go, and can reach the lungs, directly into the alveoli, alveoli are used to do gas exchange, those particles are phagocytosed by macrophages, will always stay in the alveoli, the cardiovascular system, nervous system, the respiratory system, etc. The human body produces a full range of impacts. Impact. Even if you wear a mask, it won't do any good.