Farms: Growing Underground: London's farm below the surface

Deep under the surface of London a series of abandoned tunnels could lead the way in revolutionising how food is grown in our cities. Here, herbs and micro-herbs grow without the need for soil or natural light – and there's potential to grow vast amount of produce. Here Factor Magazine visit the tunnels to see what is being grown. You can read the full feature here: http://bit.ly/10cULBL