Tag Archives: worst air polluted cities

Naij.com reports that Onitsha’s mean annual concentration was recorded at 594 micrograms per cubic metre by the World Health Organization – massively exceeding the WHO’s annual guideline limit for PM10s of 20μg/m3. This means that Onitsha is the most polluted city in the world, but the people living in it do not even know it. According to a report by ...

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