How can smog weather protect children's respiratory tract?

Because children's body organs and system functions are not fully developed, smog is more harmful to children than adults. For example, smog weather is easy to form secondary organic aerosol pollution, in which sulfate and nitrate are the main components. Sulfur dioxide adsorbed on particulate matter is catalytically oxidized into sulfur trioxide, which forms a very fine sulfuric acid mist with water vapor, which can invade children's respiratory tract more deeply and has a stronger toxic effect on alveoli. Inhalation of sulfur dioxide and particulate matter at the same time will produce synergistic effect, which can lead to pulmonary edema or tracheitis in children in severe cases. (Air rice) I would like to remind parents that they should pay attention to protecting their children's respiratory system in smoggy weather.