While water makes up 75 percent of the Earth’s composition, H2O is a precious commodity in outer space. It takes approximately $49,800 to send one gallon of water into space. Because of the high price, all the water that goes into space is recycled over and over again. Wastewater, exhaust water, urine, sweat and breath vapor are all collected and purified.
To learn more about water conservation in space as well as the complicated way in which astronauts use the bathroom, check out this infographic.
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