Stubborn roadside pollutant on rise again in Hong Kong

SCMP writes "Concentrations of a stubborn roadside pollutant intensified in Hong Kong last year, reversing three years of decline and casting doubt on the government’s ability to meet its air quality targets for 2020. Nitrogen dioxide (NO2) levels were serious enough in western parts of the city that unsafe measurements were observed inside homes and even buses, the environmental group Clean Air Network found. The group’s latest review of the city’s air showed average annual NO2 concentrations measured at the government’s three roadside air quality monitoring stations had risen from about 82 micrograms per cubic metre of air in 2016 to 85mcg last year."

Hong Kong urgently needs to increase the number of roadside monitoring stations. We need to step up adhoc monitoring in low floor apartments, and public transportation. Burying our heads in the sand is not going to make the problem go away.