Labourers

Labourers shovel coal onto a truck at a coal dump site outside Kabul January 19, 2015. Each labourer earns an average of $10 per working day, with most of them coming come from the northern provinces, leaving their families behind to find work in the capital.

Mohammad Ismail/Reuters

Labourers shovel coal on to a truck at a coal site outside Kabul on Monday

Labourers pick onions in a field near Multan in the South Punjab province May 14, 2014.

Zohra Bensemra/Reuters

Labourers pick onions in a field near Multan in the South Punjab province

Laborers cut grass in the City of Knowledge in Panama City September 20, 2013.

Carlos Jasso/Reuters

Labourers cut grass in the City of Knowledge in Panama City on Friday.

Indian laborers works to erect a temporary structure for an event in Ahmadabad, India, Thursday, June 27, 2013. (AP Photo/Ajit Solanki)

Ajit Solanki/AP

Labourers work to erect a temporary structure for an event in Ahmadabad, India, on Thursday.