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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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May 27, 2026
The business of food tours

Food tours are becoming one of the fastest-growing parts of the travel industry, with tourists increasingly choosing to explore cities and cultures through what they eat.

In this episode, Ruth Alexander explores the global rise of guided food experiences and the people building businesses around them.

In Manchester, food tour guide Julia Fairburn takes Ruth through some of the city’s best-known food spots, explaining how successful tours combine local history, storytelling and carefully paced eating experiences designed to leave visitors with lasting memories.

Eric Wolf, founder and executive director of the World Food Travel Association in Valencia, Spain, explains how food tourism has expanded worldwide into a multi-billion-dollar industry, as travellers increasingly seek authentic and immersive culinary experiences.

We also hear from Judith von Prockel, who began creating holidays centred around food experiences more than two decades ago, long before culinary tourism became mainstream. She reflects on how attitudes towards food travel have changed and why people are increasingly planning trips around what they want to eat.

And in Malaysia, Pauline Lee from Simply Enak describes the work involved in creating memorable food tours in a growing and increasingly competitive market, where guides must balance logistics, hospitality and cultural storytelling alongside the food itself.

From hidden local gems to global tourism trends, we explore why food tours have become big business — and what travellers are really looking for when they book them.

If you’d like to get in touch with the programme, please email: [email protected]

Producer: Izzy Greenfield Sound engineer: Andy Mills Picture: Simple Enak


26min 28sec



Can you feed a city from its rooftops?

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