To ease water use, UCLA engineers develop "vertical wetlands" by KCRW published on 2013-10-17T03:16:55Z Water supply is always a concern in Southern California. This year, the Metropolitan Water District is expecting an especially dry season. They’re calling on residents to grow drought resistant plants, and water their lawns less frequently. A team of engineers at UCLA are finding ways to stretch water even further. KCRW’s Avishay Artsy reports.