By mid-December, the chill winter winds had stripped South Koreas trees bare. But around the city of Gumi, about 280 kilometres south of Seoul, blighted branches still bore a shroud of brown, withered leaves - reminders of the chemical accident that shook the region some three months earlier. At the edges of arable fields, red placards waved in the breeze: "Contaminated by the hydrofluoric acid leak," they warned. "Not edible."
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