It's estimated that by 2050 more than twice as many of us will be living in cities. While urban agriculture of the community kind is on the rise, commercial urban farms are under threat.

More than 60% of Sydney’s fresh produce is grown close to the city, the bulk of it coming from commercial gardens.

How we use urban land is shaping up as one of the biggest dilemmas of the 21st Century. A booming population needs to be housed, but it also needs to be fed, and the cost of relying on imported food is already being felt.