The "Cité du Futur" has often been outlined by designers like Kurokawa, Jonas, Cook or Quarmby with radically futuristic and improbable forms, floating in the air or on the water, like sets of gigantic umbrellas or myriads of pods hanging from endless poles, where people would seem to be expected to live like insects rather than like human beings.

Intra-cities by Walter Jonas

Instead, the "City of  tomorrow" will hopefully just be another development of the Traditional City, still a meeting place allowing encounters and cultural and economic exchanges, still a place where people will enjoy walking, just like they enjoyed walking in Pompeii, 2,000 years ago. 

Axonometry for a sustainable city block in Seine-Rive-Gauche, Paris (sketch by JL Msika)

The only difference will be that the "City of  tomorrow" will be designed so as to welcome a world population which has increased tremendously, and at the same time, protect the environment in the following manner:

I. By the appropriate use of solar energy and passive solar architecture on a large urban scale; and

II. By a dense mixed-use urban design which will free the city dwellers from daily reliance on private cars.

South-east elevation is fully glazed while north-west elevation 

retains only small windows for cross ventilation. (JL Msika)

The Sustainable City Project proposal involves only existing and proven building technology. No "spacecars" levitating around,  no "floating city", etc..

Present action is urgent in the face of global warming. The sustainable city is feasible today, it is possible and necessary.