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Sean Yong / Reuters
Labourers clean windows of Zifeng Tower in Nanjing, Jiangsu province, China on Friday, May 13.
Krishnendu Halder / Reuters
Laborers sleep on sacks of onions at a wholesale market in Hyderabad, India on Thursday, Dec. 23.
Carl de Souza / AFP - Getty Images
A man works with molten steel at Ittehad Steel Mill in Islamabad, Pakistan on Tuesday, Nov. 30. Workers involved in steel making and casting at the mill work in one hour shifts due to the extreme heat and concentration required to work safely.