A report on Hong Kong’s efforts to improve air quality is expected to show “significant progress” towards hitting international targets in cutting pollutants over the past 4½ years and by 2020, the city’s No 2 environment official says.
Annual average concentrations of PM10 – specks of respirable particulates smaller than 10 microns that can enter deep into the lungs – dropped from around 53 micrograms per cubic metre in roadside readings in 2012 to...
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