Beijing experienced the best air quality in 2017 since pollution control measures were introduced five years ago, reports Free Malaysia Today. As part of these measures, the city closed six cement plants and completed upgrades in other industrial sectors.

The average PM2.5 level, measuring particulate pollution, was 58μg/m3 in 2017, a decrease of 20.5 per cent from the previous year. The density of other pollutants such as sulphur dioxide, nitrogen dioxide and PM10 was also reduced throughout 2017.