Air quality index
air quality index
a measure of the quant-ty of harmful particles and chemicals in the air.
note: the index is used by weather forecasters to indicate the purity of the air on a given day. the higher the index, the smoggier (see smog) and more polluted the air.
contemporary examples
by comparison, new york’s air quality index was 30 on friday morning.
china’s abysmal present justin green april 15, 2013
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