Scientists at the University of Witwatersrand have designed South Africa’s first app to warn residents of pollution levels, as Johannesburg suffers a spike in coal emissions in recent weeks, causing breathing problems and other health issues.
Africa’s wealthiest city lies not far from the country’s coal mines and the rotten-egg smell of sulphur has often been present in the air.
Environment Minister Willie Aucamp attributed the stink afflicting Johannesburg to
