It ensures that these transportation activities do not worsen air quality or interfere with the "purpose" of the SIP, which is to meet the NAAQS. 同時(shí)確保這些運輸項目不會(huì )使空氣質(zhì)量惡化或干擾以達到國家空氣質(zhì)量標準為目的的州執行計畫(huà)。
Due to increasing awareness of the adverse consequences of air pollution, numerous countries of the temperate latitudes have promulgated air quality standards. 由于對大氣污染的惡化情況日益關(guān)注，地處溫帶的許多國家頒布了空氣質(zhì)量標準。
