With pressure growing on available agricultural land and the logistical issues of transporting food over large distances, how will it be possible to feed an ever-expanding population?
Many are turning to the root of the problem – and are beginning to feed themselves by bringing farms into their cities.
Adam Shaw travels to New York where he meets some of the pioneers of urban agriculture, including a commercial organic farm using traditional agricultural methods but located on the roof of a six-story block in the shadow of the Empire State Building. He also learns how advances in greenhouse technology are encouraging higher crop yields in a smaller amount of space.
In other episodes in this series, Saima Mohsin visits an innovative research company that has been looking at a revolutionary way to grow plants indoors without natural light in the Netherlands, and Adam meets a specialist in public health who hopes to create a radical approach to growing food in cities – the multi-storied skyscraper farm.
If you would like to comment on this video or anything else you have seen on Future, head over to our Facebook page or message us on Twitter.
Image of Brooklyn Grange courtesy of T.Carrigan (Flickr) through Creative Commons licence.