In this ultimate farm-to-table utopia, two students seek to revive an industrial corner of Frankfurt with a symbiotic system of energy and food production. At its centre: a lush terraced greenhouse, which houses a restaurant that serves traditional cuisine. An energy-­producing tower (a “pyrolysis gasification plant with cogeneration micro-turbine”) powers the restaurant; enveloped in a lattice-like metal frame, it features an observation deck so visitors can view how this symbiosis works. It’s fuelled by wood from continuously replenished willow parks – public places with such amenities as basketball courts and fountains. This sustainable approach to urban planning would make eco-farming and green energy a highly visible part of the city, in a big and beautiful way.