A plume of thick grey smoke hangs over the Kendal power station, situated 40 km west of Witbank in Mpumalanga. (And about 110 km east of Johannesburg.) A report by Greenpeace released in October found that the Mpumalanga province has the highest levels of air pollution in the world, topping nitrogen dioxide levels across six continents. Greenpeace says the biggest sources of air pollution in the province are coal mines, transport and Eskom’s coal-fired power stations. Kendal is one of them. Thousands of tons of ash is being released into the atmosphere because the ash handling system and electrostatic precipitators at the Kendal power station have been broken down for months. The Daily Vox explains.