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And the research that they relied on in this study previously published information that showed the volume of water in all these dams. And if I go here, all those dams, they could fill the Grand Canyon twice. And so all these volumes of water, all these dams is caused a 0.9 inch, 23 millimeter fall in the seawater rub globally. And the water's stored, resulted in a full shift of about 3.7 feet, 1.1 meters over the U.S. study period. And during the 20th century, global sea levels rose by about 4.7 to 6.7 inches, 12 to 17 centimeters, where a quarter of that amount is behind dams.