Husband and wife urban farmers Olivia Hubert (L) and Greg Willerer, owners of Brother Nature Produce, pull weeds from a scallion patch on their one-acre urban farm in Detroit, Michigan, March 18, 2012. Strapped with a reputation for crime, blight and political corruption, Detroit city leaders are clutching the burgeoning revolution taking place on various levels of the food industry as a potential start of a comeback. Photo taken March 18, 2012. To match Feature USA-DETROIT/FOOD REUTERS/Rebecca Cook (UNITED STATES - Tags: FOOD BUSINESS POLITICS AGRICULTURE SOCIETY)