A type of air pollution that is a mixture of smoke and fog.
Smogs are bad for people and the environment.
Examples:
The city is covered in thick smogs.
We can't see the buildings because of the smogs.
The smogs make it hard to breathe.
The smogs are like a big, gray blanket over the city.
The smogs are so thick, you can almost touch them.
The smogs make everything look blurry and dirty.