thick smogs
heavy smogs
reduce smogs
urban smogs
toxic smogs
A: Why is the visibility so low today?
A：今天的能见度为什么这么低？
B: The heavy smogs are making it hard to see the road.
B：浓重的烟雾让路都看不清了。
1) 烟雾
2) 雾霾
3) 空气污染现象
1. 烟雾；雾霾
noun
1. A type of air pollution that is a mixture of smoke and fog.
Synonym: fog, haze