The Clean Air Network (CAN) released a statement yesterday revealing that out of the first 90 days of the year, only 19 were classified as ‘clear days’.
The results come from the Hedley Environmental Index, where a clear day is defined when all five criteria pollutants (PM2.5, PM10, SO2, NO2 and O3) complied with the short-term World Health Organization (WHO) Air Quality Guidelines at the Index’s designated urban rooftop stations.
According to CAN, roadside air pollution is the main factor that affects Hong Kong’s air pollution with figures remaining at double of the WHO’s safety level.
The Hedley Environmental Index is managed by the School of Public Health at the University of Hong Kong.
To find out more about CAN, visit www.hongkongcan.org/hk.Tags: air pollution, clean air network, pollution in hong kong