'If you are cut off somewhere in the desert, you could survive because of this device'
USA - A device that can create water out of thin air in even arid environments has been invented that could make Coleridge’s famous line: “Water, water, everywhere, nor any drop to drink” a thing of the past.
Using only the power of the sun and a special material with some extraordinary properties, the device is capable of producing 2.8 litres of water in 12 hours.
And it can work in conditions where humidity is as low as 20 per cent.
Professor Omar Yaghi, who helped create the prototype water harvester, said: “We wanted to demonstrate that if you are cut off somewhere in the desert, you could survive because of this device.
“A person needs about a [330ml] can of water per day. That is something one could collect in less than an hour with this system.
“This is a major breakthrough in the long-standing challenge of harvesting water from the air at low humidity.
“There is no other way to do that right now, except by using extra energy. Your electric dehumidifier at home ‘produces’ very expensive water.”
But, as well as saving people stranded in a desert, the harvester could become a major part of everyday life, enabling people to have water without a connection to the public supply or a well.
“One vision for the future is to have water off-grid, where you have a device at home running on ambient solar for delivering water that satisfies the needs of a household,” said Professor Yaghi, a chemist at University of California, Berkeley.
“To me, that will be made possible because of this experiment. I call it personalised water.”
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