To celebrate the 150th anniversary of its Botanical Gardens, Metz, one of France’s greenest cities, asked me to portray in drawings what the city would look like 150 years from now. Once again, I made a projection of a desirable future, setting out multiple hypotheses for the biomimetic development of an existing city but taking care not simply to repeat suggestions that have already been made. The panoramic view of Metz shows, in the foreground, organic constructions which serve as launch pads and garages for manta ray-style dirigibles, and another building whose roof can be accessed by caterpillar-track vehicles and pedal-powered vehicles. This sweeping panorama was reproduced on aluminium panels for exhibition, with around fifty other picture representations of the plant-based city, in Metz esplanade in 2017. In its green-space setting, this open-air exhibition could be seen by a large number of visitors.