Food security may be less of an issue for urban dwellers than previously thought. Take the case of 70-year-old Andy Hoi-Csiu Chan. He tends bamboo, peonies, watermelon, eggplants and other vegetables in his Chicago backyard. Chan, an immigrant from China who teaches traditional brush painting at his Chinatown studio, started his garden about 12 years ago. Chan is a member of a significant and previously undocumented population of Chicago urban farmers. Though Chan said he wasn't aware of it, researchers at the University of Illinois recently discovered that many of his neighbors, especially those of Chinese origin, are also enjoying the fruits and vegetables of backyard gardening.