Locals call it the “bathtub ring”. A white strip more than 150 feet tall encircles the turquoise surface of Lake

Locals call it the “bathtub ring”. A white strip more than 150 feet tall encircles the turquoise surface of Lake Mead, America’s largest reservoir, showing visitors how high the water once was, and how low it has fallen.
economist.com/united-states/… https://t.co/uWm5fRcZ62

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