More than 50% of our planet's massive human population is concentrated into urban centres - and on current estimates, that's likely to be as high as 80% by the year 2050, a year many of us will be around to see. So the challenge facing today's forward-thinking architects is how to create positive outcomes out of a crushing space constraint. Going upwards, in projects like Eugene Tsui's Ultima Tower and the London Vertical Village concept, seems to offer some practical solutions to the living space conundrum - but what about feeding all those people? Vertical Aeroponic Farming seems to be an idea whose time has come - it will let us use land, nutrients, power and water much more efficiently than ever before, while delivering a quality-controllable, year-round and emissions-positive food source for urban communities. Eric Vergne's Dystopian Farm is a design study that examines how a vertical farm might use the latest in agricultural and architectural technology to feed the cities of the future.