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air pistol
air plant
air pocket
air police
air popper
air pressure
air print
air pump
air quality index
air rage
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air raley
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air rights
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air quality index
air qua·li·ty in·dex (plural air quality in·dex·es or air qua·li·ty in·dic·es)


noun 
Definition:
 
indicator of air pollution: a numerical scale that indicates how polluted the air is
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