“雾霾”这个词从哪里来的？

Where does the word smog come from?

这是印度尼西亚城市上空的雾霾。

This is smog over a city in Indonesia.

调查显示，大多数市民对政府减少雾霾的努力感到满意。

The survey says that the majority of citizens are satisfied with the government's efforts to reduce smog.

许多城市正在采用反污染技术来对抗雾霾。

Many cities are adopting antipollution technologies to combat smog.

只有无雾霾的自行车才能走在闪闪发光的自行车道上。

Only smog-free bikes can go on the shining bicycle path.

这是一台与自行车相连的空气净化机，是无雾霾项目的一部分。

It's an air-cleaning machine connected to a bicycle and is part of the Smog Free Project.

雾霾也不只是看上去让人不舒服。

Smog isn't just an aesthetic eyesore.

所以这种雾霾是黄色的。

That's what gives this type of smog its yellowish color.

如今，雾霾仍然是全世界面临的主要问题。

Smog remains a major problem around the world.

为什么其它城市没有遭到雾霾的袭击呢？

So why does smog affect some cities but not others?