The University of California, Berkley research group led by Omar M. Yaghi published recently an article in ACS Central Science describing how they built and tested a metal-organic framework water harvester prototype. The system produced fresh water at the rate of 0.7 L/day in the Mojave Desert during a 3-day trial (October 17–20, 2018). During this period the ambient air dew-point was less than 5 °C for 85% of the time.
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I have been researching and developing drinking-water-from-air technologies since 1984. As a physical geographer, I strive to contribute an accurate, scientific point-of-view to the field.