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Smog
煙霧
What is smog?
什么是煙霧？
It is fog combine with dirt and dust in the air.
它是霧與空氣中的粉塵相結合的混合物。
Is it a natural event? No, it isn't.
它自然事件嗎？不是。
In fact, smog is a type of air pollution.
煙霧實際上是空氣污染。
In big cities, smoke from automobiles and factories goes up into the sky and meets the moisture in the air.
在大城市，汽車和工廠排放的廢氣上升到空中并與空氣中的濕氣相遇。
When the air cools down at dawn, a huge amount of the dirty moisture in the sky comes near the ground.
拂曉時分空氣溫度下降，空中大量骯臟的濕氣接近地面。
And what happens?
然后會發生什么？
It forms smog.
它會形成煙霧。
Smog is a huge problem to people in big cities.
煙霧是大城市居民面臨的重大問題。
Smog causes many kinds of lung diseases and eye or nose problems.
煙霧會引發各種肺病和眼鼻問題。
