International troops pulling out of Afghanistan have left behind a lethal legacy of unexploded bombs and shells that are killing and maiming people at a rate of more than one a day. The vast majority are children.

Bombs dropped from the air coupled with munitions left behind in makeshift firing ranges in rural Afghanistan have made parts of the countryside perilous for locals who are used to working the land for subsistence and raw materials.

Since 2001, the coalition has dropped about 20,000 tonnes of ammunition over Afghanistan. Experts say about 10% of munitions do not detonate: some malfunction, others land on sandy ground. Foreign soldiers have also used valleys, fields and dry riverbeds as firing ranges and left them peppered with undetonated ammunition.