World’s most polluted cities ranked

ISwiss monitoring firm IQAir has published its latest World Air Quality Report, which ranks the world’s most polluted cities in terms of levels of particulate matter (PM2.5 ) and reveals that climate change events are impacting on air pollution more than ever.

Using a weighted population average, Bangladesh is the most polluted country for PM2.5  exposure. Pakistan, Mongolia, Afghanistan and India follow behind respectively, deviating from one another by less than 10 per cent.

Bosnia and Herzegovina is the highest-ranking country in Europe for PM2.5  pollution, featuring as the 14th most polluted country globally, with only 4µg/m3 less than China’s national PM2.5 weighted average. Lukavac in Bosnia and Herzegovina, which has several chemicals factories, is Europe’s most polluted city, with an average PM2.5  level of 55ug/m3.

The report also shows that climate change events, such as sandstorms and wildfires, elevated levels in countries and cities such as Singapore, Australia, Indonesia, Brazil, Kuala Lumpur, Bangkok, Chiang Mai, and Los Angeles, among numerous others.

Source: AirQualityNews, 26 February 2020.

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