Waste not, want not

June 5 2014 - 3:00am

Doctor R.C. Jha put an apple-sized lump of human excrement to his nose in the manner of an excited gourmand and inhaled mightily. "Black gold," he says, smiling and exhaling at the same time. "It has phosphorous, nitrogen, potash. This is not waste, it's fertiliser."

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