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Saffron, the world's most expensive spice, is seen as an alternative crop to opium poppies for poor farmers

By Jalil Ahmad Razayee

HERAT, Afghanistan, Nov 23 (Reuters) - It is early morning in a saffron field outside the western Afghan city of Herat and dozens of women are harvesting the delicate purple flowers, working quickly to gather as many as they can before the sun gets too hot.

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