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Powder Pulls Drinking Water from Desert Air
A structure known as a metal organic framework traps water vapor by night, then releases it when heated the next day. Christopher Intagliata reports. Learn more…
How Hong Kong 'Sees' Invisible Tailpipe Emissions and Pulls Polluters Off the Road
The city has deployed a system of sensors to flag highly polluting vehicles. Nearly all of them have been repaired, helping to clean Hong Kong’s air. Learn more…






