Feeding the City Masses With Vertical Farming

Interesting article in The Guardian today about feeding the urban masses of the future through vertical farming: instead of growing out, you grow upwards.

Using tried and tested hydroponics, and good building design, vertical farming enthusiasts reckon that a thirty story, downtown vertical farm could provide enough food for 10,000 people.

Other claims about the vertical farm or garden that leap out from the article: they use seven times less energy than traditional industrial farming (taking account of food miles) and are twenty times more productive.