Air pollutants are divided into primary pollutants and secondary pollutants. After being discharged into the atmosphere from the pollution source, direct air pollution is called primary pollutants, mainly including sulfur dioxide, carbon monoxide, nitrogen oxides, nitrogen dioxide, particulate matter (floating dust, falling dust, oil fume, etc.), nitrogen, oxygen-containing, nitrogen, chlorine, sulfur organic compounds and radioactive substances. Secondary pollutants are pollutants exposed to sunlight, The primary pollutants discharged into the environment change under the action of physical, chemical or biological factors, or react with other substances in the environment to form new pollutants with different physical and chemical properties from the primary pollutants.
According to the above definition, which of the followings does not mention secondary pollutants:
Nitrogen oxides and acetaldehyde emitted from industrial production will undergo photochemical reaction to produce peroxyacetyl sulfate, which will strongly stimulate eyes and cause a series of symptoms such as dyspnea, cardiac dysfunction and pulmonary failure