By Naoki Nitta for Grist.Broadcast version by Suzanne Potter for California News Service reporting for the Grist-Public News Service Collaboration Standing under a shady tree drooping with pomegranates late last year, Brad Simmons, a retired metal fabricator who has lived in Healdsburg, California, for 57 years, showed off his backyard orchard. Along with the apple, cherry, and peach trees, he's packed one pear tree, two lemon trees, and a century-old olive tree into his bungalow's compact garden. Of course, the small grove requires plenty of water - an increasingly scarce resource in a state that continues grappling with a historic drought despite recent torrential rains. ...