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“The government blames the current crisis on changing climate [but] the dramatic water security issues of Iran are rooted in decades of disintegrated planning and managerial myopia,” says Keveh Madani, a former deputy head of the country’s environment department and now director of the United Nations University’s Institute of Water, Environment and Health.

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While failed rains may be the immediate cause of the crisis, they say, the root cause is more than half a century of often foolhardy modern water engineering — extending back to before the country’s Islamic revolution of 1979, but accelerated by the Ayatollahs’ policies since.