Young Champions of the Earth: mapping clean water in China
Xiaoyuan Ren has developed MyH2O, a data platform that provides information about the quality of groundwater in villages across the country, so residents know where to find clean water to stay healthy.
Her research suggests that around 40 per cent of those people had concerns about their drinking water but no ability to test it.
An army of volunteers travelled to around a thousand villages in 26 Chinese provinces to test water quality and then log the results in the app. MyH2O also suggests ways to purify contaminated drinking water.