Air pollution in Hong Kong rose last year as social-distancing rules eased: NGO

Air pollution in Hong Kong was worse in 2021 than it was the year before, with the relaxation of social-distancing measures as the pandemic stabilised blamed for bringing more traffic back to the city’s roads.Analysing government data, the Hong Kong NGO Clean Air Network found that the annual average concentrations of major air pollutants – nitrogen dioxide (NO2), respirable suspended particulates (PM10), fine suspended particulates (PM2.5) and ozone (O3) – all increased last year from 2020…

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