It has been billed as the worlds largest rooftop farm. A new 150,000-square-foot urban farm in Paris has plans to produce a whopping 2,200 pounds of fruit and vegetables every day during the summer months.

When complete in 2022, its owners say it will grow 30 different varieties of fruits, vegetables and herbs, most of which will be sold to restaurants, grocers and Parisians directly through veg box schemes. There is a big demand for good, local food, says Pascal Hardy, founder of the European urban farming business Agripolis, which is building the farm.

Meanwhile, in Long Island City, New York, the urban farm Brooklyn Grange occupies the rooftop of the historic Standard Motors building, growing salad greens, hot peppers, tomatoes, basil and other crops against the backdrop of the iconic Manhattan skyline.

Back in 2009, the farms founders had set out to see whether operating an urban farm in one of the most expensive real estate markets in the nation was viable. A decade later, their original farm is still thriving, according to co-founder and chief operating officer Anastasia Cole Plakias. It has grown to include farms at the Brooklyn Navy Yard and in Brooklyns Sunset Park neighborhood, the largest rooftop farm in New York City. With a total of five and a half acres in production, the farms annual harvest exceeds 80,000 pounds of fresh fruit, vegetables and herbs across three sites.

Urban farms are not new, but they are experiencing a resurgence, taking root in cities across the world.