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A resident walks away after cleaning a toilet block, recently built by villagers with support from Sulabh International Social Service Organisation, in Korali village, Haryana, India, on Wednesday, Nov. 4, 2015. Prime Minister Narendra Modi's Clean India" campaign includes a pledge to build 50 million toilets by the 150th anniversary of Mahatma Gandhi's birth in 2019. The effort aims to halt the contamination of groundwater that causes illnesses such as diarrhea and cholera, costing the nation about $54 billion a year, according to the United Nation's Children's Fund. Photographer: Prashanth Vishwanathan/Bloomberg via Getty Images

A resident walks away after cleaning a toilet block, recently built by villagers with support from Sulabh International Social Service Organisation, in Korali village, Haryana, India, on Wednesday, Nov. 4, 2015. Prime Minister Narendra Modi's Clean India" campaign includes a pledge to build 50 million toilets by the 150th anniversary of Mahatma Gandhi's birth in 2019. The effort aims to halt the contamination of groundwater that causes illnesses such as diarrhea and cholera, costing the nation about $54 billion a year, according to the United Nation's Children's Fund. Photographer: Prashanth Vishwanathan/Bloomberg via Getty Images