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Kate Springer of TIME's Ecocentric blog, has some eye-popping numbers in her latest post on land subsidence , which she says is affecting more than 50 cities in China. Across the country, 49,000 sq. mi. of land have dropped at least 8 in, and Shanghai is, unsurprisingly, leading China's rapid descent into the ground, and has sunk more than 6 ft. since 1921.

