雾是飘浮在低空的细小水珠。在小水珠中溶解了一些地表的可溶性有害物质。当细小水珠从地表上升到低空的过程中,还沾带着一些有害的固态小微粒,特别是城市地面污染较严重,雾中有害物质相对较多。早晨在雾中跑步做剧烈运动,大量吸入有害物质或身体某些敏感部位接触这些有害物质,可引起气管炎、喉炎、结膜炎和 Fog is a small drop of water floating in the air. In the water droplets dissolved some of the surface of the soluble harmful substances. When the tiny water droplets rise from the surface to a low altitude, they are also smeared with some harmful small solid particles, especially the urban ground is more polluted, and there are relatively more harmful substances in the fog. Running in the fog in the morning to do strenuous exercise, inhaling harmful substances or exposure to these harmful substances in certain sensitive parts of the body may cause bronchitis, laryngitis, conjunctivitis and