Is South Africa’s Mpumalanga province the ‘world’s largest air pollution hotspot’?

Is South Africa’s Mpumalanga province the ‘world’s largest air pollution hotspot’?
South Africa’s coal-rich Mpumalanga province is the “world’s largest air pollution hotspot”, an international environmental group recently announced. But Greenpeace then said Mpumalanga only led the w…
Is South Africa’s Mpumalanga province the ‘world’s largest air pollution hotspot’?