When air that is rich in fog is zapped with a beam of electrically-charged particles, known as ions, water droplets become charged and thus can be drawn toward a mesh of wires placed in their path. The droplets then collect on that mesh, drain down into a collecting pan, and can be reused in the power plant or sent to a city’s water supply system. (Learn more: http://news.mit.edu/2018/new-system-recovers-fresh-water-power-plants-0608)
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Video: Varanasi Research Group/edited by MIT News