Researchers at ETH Zurich, Switzerland, have developed a new technology that can harvest fresh water from the atmosphere all day and all year long, without using any additional energy or human help. The water harvesting device consists of a specially coated glass pane that reflects solar radiation and radiates its own heat into the atmosphere. This glass, which is coated with a superhydrophobic (water repelling) coating, also causes condensed water to bead up and roll inside a collection container. The 10cm-large pilot system that is set up on the terrace of the ETH building collected 4.6 millilitres of water per day via condensation. The aim of this experiment is to create a device that can help countries that face water scarcity.
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