Ambientairqualitystandard between Chinaand America wascomparedinthefieldsoffunction determination,standard . slevel,pollutant . sitem,sampletimeand massconcentrationlimitetc. Thereactionfrequencyin America washigherthanin China,pollutant . scontrolitem waslessthan China, andthestandard . sleveland mass concentrationlimitwerebroaderthan China. ButthecontrolofPM 2.5 was moreimportantin America. |