The 53-city International Water Management Institute survey showed 80 percent of those cities regularly use untreated or partially treated waste water for urban agriculture. Officials said the practice is often critical to farmers’ incomes and urban food security but raises health concerns. “Irrigating with wastewater isn’t a rare practice limited to a few of the poorest countries,” said IWMI researcher Liqa Raschid-Sally, lead author of a report on the survey. “It’s a widespread phenomenon, occurring on (49 million acres) across the developing world …”

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Source: http://www.upi.com/Science_News/2008/08/21/Untreat

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