In urban planning and geography, the concept of metabolism is frequently discussed. This organicist metaphor likens a territory to a body, traversed by flows of materials and energy that link it to its environment. From a quantitative perspective, these flows can be measured over time and space to assess what a territory consumes, processes, and produces. However, a qualitative approach is equally crucial, examining the political and social trade-offs that shape urban metabolisms. With this in mind, we spoke with two researchers, Clément Dillenseger and Pierre Desvaux, who have explored the waste sector to analyze the socio-technical infrastructures that underpin metabolism and the imaginaries that shape its perception.
Podcast transcript: urban metabolism, at the heart of the matter
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All research axes
This theme explores the sustainability issues raised by the Anthropocene at the scale of buildings and urban environments, in all their material aspects, from design and construction to the uses to which they are put.
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Beautiful like an encounter on the glass roof of colored clouds
For Daniel Buren, architecture is an open-air studio. In an exclusive interview with architect Philippe Chiambaretta, he talks about his site-specific work, where art and architecture meet, just like the Nuages Colorés that cover the scales of the 175 Haussmann glass roof.
Reusing turbine blades : the winds of change
The growth in energy consumption and the obsolescence of our infrastructures suggest that by 2030, we’ll have a stock of 60,000 tonnes of end-of-life wind turbines per year. To absorb this material on an industrial scale, we need to invent new ways of producing, consuming and building. With this in mind, the La Paletière project aims to reuse turbine blades – composite materials with multiple properties – by turning them into roofing elements.
Perspectives
Mathieu Arnoux, Professor at the University of Paris and Director of Studies at the EHESS, Isabelle Bensidoun, economist at the CEPII, Vincent Charlet, economist and founder of the Fabrique de l’Industrie and Liliana Doganova, sociologist and researcher at the CSI des Mines de Paris. This concluding conference looks at the social and economic dynamics associated with the exploitation of materials on a national and global scale. The war in Ukraine has revealed our dependence on our neighbours and reopened questions of sovereignty and self-sufficiency. France has been less affected by the Russian gas embargo than Germany, but the transition to renewable energies will not happen without the rare earths that we import mainly from China. The limits of globalisation seem to have been reached. What does this mean for our industry, our sectors and our economic policy? What role will the markets play, particularly the carbon market, in encouraging national and European materials?
Living matter
With Marie Sarah Adenis, artist, Aurélie Mossé, research professor at ENSAD, and Simon Trancart, Head of Adaptative Laboratory Evolution at Ginkgo BioWorks. Wood is often referred to as a living material because it reacts to ambient humidity and develops a patina. However, when a tree is cut down to exploit its wood, it dies and ceases to photosynthesise. What other forms of living matter can we cultivate and grow to build and create, and what ethics should we apply? What does the future hold for organic materials that can regenerate rapidly or perhaps never die and continue to evolve as living matter? From the colourimetric properties of microbes to the use of algae to develop alternative chemical reactions to form cements and ceramics that emit less carbon, what possibilities does living matter offer us for rethinking creation?
