Syrian refugees at Zaatari camp in Jordan are working with scientists from the University of Sheffield and the UN Refugee Agency to create a way to grow healthy, fresh food with nothing but water and old mattress foam.

These 'recycled gardens' use the mattresses in place of the soil, which solves two problems in one: It reuses the mountain of plastic mattresses that have piled up in the camp and it allows everyone to grow fresh food in a crowded, desert environment.

Victoria Gill has been to the camp in Jordan to see how it's working.

Produced by Vanessa Clarke. Filmed and edited by Stephen Fildes.