Colombia: In the Land of El Dorado, Clean Water Has Become ‘Blue Gold’

Apr 10, 2019 | Damian Carrington, Guardian
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In the land where the legend of El Dorado began, the race is on to solve the mystery of a vital 21st-century treasure – the water that tens of millions of people rely upon across northern South America. “It’s blue gold, and we are looking for it,” says Mauricio Diazgranados, a Colombian botanist.