Labourers

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. Read more