the burning of fossil fuels is the cause of smog in china.
the burning of fossil fuels is the cause of smog in china.
what is the cause of smog in china?
the burning of fossil fuels
Na
Na
although smog is a chronic condition, unfavorable weather conditions and excessive pollutants can cause intense concentrations of smog that can cause acute illness and death; because of their unusual visibility and lethality, these intense smog events have often been publicized in the media and are typically described as disasters or, more specifically, environmental disasters. an acute "smog event" may also be called simply "a smog", a smog "episode", or a "killer smog" (if it caused, or had the potential to cause, deaths).









































section::::background.:smog in the united states and new york city before 1966.
1966 new york city smog