Farmville USA, Motown to San Fran

San Francisco and Detroit may be in full bloom this spring thanks to urban farms. Who are responsible for these urban farm projects? Could urban farms really remake either of these cities?

The cities' housing markets don't have much in common. San Francisco is frequently in the news for high priced homes, while Detroit is getting press over their $1 homes and esoteric structures like two-story beehives.

What both cities share is a renewed interest in urban farming...