What are the dangers of heavy fog?

Foggy weather has a great impact on traffic. In foggy weather, planes cannot take off and land, and cars, ships, etc. are also prone to traffic accidents due to low visibility. There are also certain hazards to agricultural production in the fog. If there is heavy fog for several consecutive days, crops will lack light, which will affect growth and induce diseases. If wheat encounters heavy fog for more than three consecutive days during heading, it is easy to cause scab. Fog also has certain hazards to human health. According to measurements, the proportion of acids, alkalis, salts, amines, phenols, dust, pathogenic microorganisms and other substances harmful to the human body contained in fog droplets is dozens of times higher than that of ordinary atmospheric water droplets. If people move around in the fog, they will inhale these harmful substances in the fog, which can induce or aggravate many diseases such as tracheitis, pharyngitis, conjunctivitis, etc.