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The Food Chain
Can you feed a city from its rooftops?
The Food Chain
Jun 21, 2023

Could our office, apartment and public buildings also be farms?

In this programme, Ruth Alexander meets the pioneers of rooftop farming, turning concrete into green spaces where fruit and vegetables are grown.

We find out about the logistics, the challenges, and whether it has the potential to feed city populations.

In Barcelona, Spain, she meets Joan Carulla, who recently celebrated his 100th birthday. Joan has been tending his private rooftop vegetable garden for fifty years with the help of his son, Toni. They’re joined by friend and fellow rooftop gardener, Robert Strauss.

Ruth speaks to Kotchakorn Voraakhom, a landscape architect in Bangkok, Thailand. She designed a farm on the roof of a university in 2019, the largest in Asia at that time.

And Mohamed Hage, co-founder and CEO of Lufa Farms in Montreal, Canada explains how they are farming rooftops on a commercial scale. To date the company has four rooftop greenhouses and an indoor farm, which produces enough food to feed about 2 per cent of the city’s population.

Presented by Ruth Alexander.

Produced by Beatrice Pickup.

(Image: Joan Carulla sat on a bench in his rooftop garden in Barcelona, Spain. Credit: BBC)

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Jun Tanaka, chef-owner of Michelin-starred restaurant The Ninth in London, looks back on starting out more than three decades ago. Preeti Mistry, executive chef at Silver Oak in California, shares her perspective after 25 years in the industry. And Manon Fleury, head chef at Datil in Paris and co-founder of an organisation working to prevent violence in kitchens, explains why she believes change is both necessary and possible.

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If you would like to get in touch with the show, please email: [email protected]

Producer: Izzy Greenfield Sound engineer: Annie Gardiner Image: credit - getty


26min 29sec




Can you feed a city from its rooftops?

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