Weighed down by ragged sacks of coal, a donkey walks through the narrow tunnels of a coal mine in Choa Saidan Shah. Miners use the donkeys to transport coal from the depths of the mine. The animals make about 20 trips a day, carrying sacks weighing 20 kilos.
The animals are a major investment for the miners. Afghan donkeys, which are considered the most resilient, cost around $600.