Transboundary air pollution is severe threat to Thimphu’s air quality

PM2.5 is more than three times the WHO’s recommended limit for Thimphu The average fine Particulate Matter (PM2.5) concentration during the years 2018 to 2020 was 32.47 microgram per cubic meter (µg/m3), three times the World Health Organization’s (WHO) recommended limit of 10 µg/m3 for Thimphu. This is as per a recent study, tittled “Transboundary sources […]