The World Health Organisation (WHO) has tagged Onitsha, in Nigeria,the world’s most polluted city.
According to the report published by the World Economic Forum (WEF), Onitsha produced pollution “levels of nearly 600 micrograms per cubic metre of PM10s – around 30 times the WHO recommended level of 20 micrograms per cubic metre,” to get the unenviable rating.
Onitsha, along with three other Nigerian cities, Aba, Kaduna and Umuahia, featured in the top 20.
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