Novella Carpenter’s 2009 memoir, Farm City, trumpets the value of raising chickens, pigs and bees—in Oakland. Urban farming is a response to a variety of pressures.

Detroit's livestock rules have led to some disputes, like when Idyll Farms in Brightmoor was told to remove its 18 goats less than two days after launching, at the risk of facing a $500 fine per goat.

Meet the Urban Farmers Shaping the Future of the $5 Trillion Agriculture Industry How a group of startups has moved farms to high-rise plant factories in the most unlikely locations.