The weekend science ticket. Eight billion inhabitants in cities in 2050: which cities?


A view of Paris. Drawing. (MAXPPP)

Half of the world’s population today lives in cities. And 80% of this is expected in 2050. It is therefore urgent to rethink the urban development model that has developed in recent years, particularly around the car, in particular the commercial and residential areas on the outskirts, linked by expressways.

However, this space-consuming model, particularly agricultural, increases travel. Densifying to limit urban sprawl is essential for Cécile de Maisonneuve, president of the Fabrique de la Cité:
“To succeed in containing urban sprawl, the French must be reconciled with density. Indeed, it is not necessarily the ugly city, the detestable city. For example, Paris is one of the densest cities in the world. world, and yet it is one of the most pleasant to live in. “

We are starting to see buildings and neighborhoods with positive energy, with solar farms on the roofs in particular. We also store rainwater there, we do urban agriculture, we manage electric cars that store and even restore energy to buildings, for example to smooth peaks in consumption.

We must also conceive of our cities today as formidable reservoirs for energy storage.

Cécile de Maisonneuve, president of the Fabrique de la Cité

But apart from energy, there is town planning, mobility, another way of consuming, For Michèle Pappalardo, former president of Ademe and former chief of staff of Nicolas Hulot, the ideal city can be summed up in four words that all start with the letter S.

It is first of all services such as cultural activities, health – air quality, noise – safety, especially in relation to climate change and the last S is sobriety, in consumption of space to accommodate all kinds of populations . “

The ideal city of the future is where it will be good to live, with diversity, adapted housing, shared mobility, work and shops nearby. In short, a smart city is possible …

Discover Vivapolis, the network of public and private actors of the sustainable city on. As well as the Palladio foundation which acts for the city of tomorrow.

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