Showing 761 - 780 results of 1,770 for search '(( 2020 e decrease ) OR ( 10 ((we decrease) OR (((mean decrease) OR (a decrease)))) ))*', query time: 0.20s 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 proportion of air quality Class I improved by 32.14%, and the number of days with PM2.5, SO2, and NO2 as primary pollutants decreased while they increased for PM10, CO, and O3 in 2020. …”
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    Trends in prevalence of depression and anxiety symptoms and effects of sociodemographic variables before and after the first wave of COVID-19 in Qatar by Khaled, Salma M.

    Published 2022
    “…The data for 2020/21 showed a 35.1% and 29.2% decrease in depression and anxiety symptoms scores compared to pre-pandemic years (2017/2018) after adjusting for sociodemographic factors. …”
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