If the population continues to grow at its current rate, the world is going to have nearly 400 million new mouths to feed by the end of the decade. More than 60% of them will be in cities.
Urban gardens offer a sustainable way to bring fresh food to millions of city dwellers, often at a fraction of the cost of traditional farming.
These 9 spaces are incredible examples of downtown innovation. Some are high in the sky while others are tucked away in the depths of old factories or abandoned buildings, but they're all changing the face of farming and proving that a concrete lot may just be the new grassy field.