air quality
Concise Oxford English Dictionary © 2008 Oxford University Press:
air quality
▶noun the degree to which the air in a particular place is pollution-free.
'air quality' also found in these Oxford entries:
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air qualityConcise Oxford English Dictionary © 2008 Oxford University Press: air quality ▶noun the degree to which the air in a particular place is pollution-free. 'air quality' also found in these Oxford entries:
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