The World’s Cities Are Sinking

The World’s Cities Are Sinking

by Ashira Morris, ODP Staff Writer How much does a city weigh? You can’t put San Francisco on a scale, but new research from the US Geological Service estimates that the number is 1.6 trillion kilograms, about the same as 250,000,000 elephants.  This isn’t just a clever math problem, though: all that weight is causing […]

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