Yumi Wong adores the latest addition to her southern California home: a lush, emerald lawn. “It just looks much nicer with all the green. It feels clean and peaceful,” she said on Tuesday, padding across the 2,800-sq-ft grass expanse. “I thought about artificial turf but I just wanted the real stuff back.” It arrived last week, a boon for her two children, two dogs and tortoise, and fitted right into Rancho Cucamonga, a neighbourhood east of Los Angeles. “Here nobody on the street has got rid of grass,” said Wong, 36, a physician’s assistant.