Unique urban farms around the world

Lufa Farms in Montreal, Canada, grows vegetables on two sprawling rooftop
greenhouses today and is expanding to two more. Photograph: /Lufa Farms

Many shoppers like the idea of buying local. After all, it can mean fresher and healthier foods, stronger local economies, direct contact with food producers and in some cases — but not always — lower carbon emissions.

But most of us have only a few options for participating in the local food movement: visiting the farmers market or signing up for a community supported agriculture (CSA) subscription. As the movement continues to grow and evolve, however, social entrepreneurs are experimenting with novel ways to make local agriculture an integral part of urban life.

HERE are 10 of the most intriguing projects currently underway: