PM2.5 refers to particles with a diameter of less than or equal to 2.5 in the atmosphere, also known as particles that can enter the lung. The diameter is equivalent to 1/20 of the thickness of human hair. The main source of PM2.5 is the residues produced by combustion in the process of power generation, industrial production and steam. Because these particles are too light, it is difficult to fall naturally on the ground, but are suspended in the air for a long time, PM2.5 has small diameter, long residence time in the atmosphere, long transportation distance, and mostly contains harmful substances such as sulfur dioxide, nitrogen oxides and ammonium sulfate, which has a great impact on human health and atmospheric environmental quality.
incorrect?
PM2.5 will directly bring harmful substances such as sulfur dioxide into human body and affect health.