Showing 721 - 740 results of 1,854 for search '(( 10 ((peter decrease) OR (((a decrease) OR (mean decrease)))) ) OR ( 25 11 decrease ))*', query time: 0.14s Refine Results
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    Impact of SARS-CoV-2 on Ambient Air Quality in Northwest China (NWC) by Zaib, Shah

    Published 2021
    “…The PM2.5 failed to comply in SN and XJ; PM10 failed to comply in SN, XJ, and NX with CAAQS Grade II standards (35 µg/m3, 70 µg/m3, annual mean). …”
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