The city implemented measures to improve the quality of clean air.
polluted air
Frequency:
60
%
The industrial area was known for its polluted air.
thin air
Frequency:
45
%
As we climbed higher, the air became thin and difficult to breathe.
Idiomatic Expressions for air
Phrase: put on airs
Meaning: to act in a way that shows a sense of superiority or arrogance
Usage: She always puts on airs whenever she's around wealthy people.