Urban metabolism, at the heart of the matter

“ Exchanges of material flows are territorialized: in this sense, they are part of systems of power. ”

  • Publish On 5 March 2025
  • Clément Dillenseger, Pierre Desvaux
  • 32 minutes

When we speak of urban metabolism, we are generally referring to the materials that enter and leave the city organism. Among these, waste plays a decisive role, challenging our understanding of what is clean and what is dirty, what is at the end of its life and what can be reused, what is new and what is outdated. Thus, studied from a qualitative rather than quantitative approach, waste reveals a great deal about our urban imaginations, which differ from country to country across the globe. This is what geographers Clément Dillenseger and Pierre Desvaux explain in Métabolisme(s). Matière en circulation, matière en transformation [Metabolism. Circulating matter, transformed matter] (co-authored with Laëtitia Mongeard, published by Éditions deux-cent-cinq). Read the podcast’s transcript.

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Podcast transcription: Raphaëlle Guidée

Raphaëlle Guidée is a specialist in narrative representations of economic, environmental and societal collapse. For over 10 years, she has analyzed the narratives surrounding Detroit’s bankruptcy in order to understand how an apparent ruin of capitalism can inspire discourses of domination or resistance. In La ville d’après : Détroit, une enquête narrative [The Aftermath City: Detroit, a narrative investigation] (Flammarion), rather than focusing on fictions, she seeks out testimonies and concrete stories, believing that modern times don’t need new narratives. We simply need alternative narratives. Read the transcription of her podcast below.

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Vidéo

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.

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Reshaping myths to reveal pressing realities

Ashfika Rahman is a visual artist based in Bangladesh, who recently won the Future Generation Art Prize awarded by the PinchukArtCentre in Ukraine. Faced with the overwhelming power of information systems that are serving dominant narratives, she is working on creating alternative medium of expression, giving their voice back to marginalized communities in her homeland, particularly women. Through her art, Rahman questions myths, folk tales and widely spread prejudice that are still shaping our cultures and legitimating violence, adopting a contemporary and feminist lense. We met with her to discuss her recent work, Behula These Days where she brings together ancient crafts and new techniques to share the poignant and heart-wrenching experiences of women living in one of the most floodprone areas in Bangladesh.

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Using AI to tell history — podcast transcription

Read our discussion on the subject of generative AI with Raphaël Doan, a specialist in the sciences of Antiquity and author of the uchronia Si Rome n’avait pas chuté (If Rome hadn’t fallen), an essay imagining, with the help of AI, what might have happened if the Industrial Revolution had taken place under the Roman Empire. Through this experiment, fascinating possibilities for historical and archaeological research are outlined, as AI facilitates the processing of archives, the translation of lost languages and the deciphering of burnt texts.

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Educating Citizen Architects: for a meaningful architecture

Andrew Freear runs the Rural Studio program at Auburn School of Architecture (USA). He believes that schools of architecture have an ethical responsibility to train citizen architects who are locally committed to concrete projects and experientially connected to contexts and places. To design an inclusive city, the Studio adopts an experimental field approach, combining analysis of the territory’s endemic problems, understanding of residents’ needs and new construction techniques. Read the full interview published in STREAM 05!

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Podcast

“ A catastrophe is when a belief or certitude suddenly collapses. From its ruins, narrative, political, economic and ecological utopias can be reborn. ”

Podcast

“ A catastrophe is when a belief or certitude suddenly collapses. From its ruins, narrative, political, economic and ecological utopias can be reborn. ”


Can new narratives arise from ruins?

Raphaëlle Guidée is a specialist in narrative representations of economic, environmental and societal collapse. For over 10 years, she has analyzed the narratives surrounding Detroit’s bankruptcy in order to understand how an apparent ruin of capitalism can inspire discourses of domination or resistance. In La ville d’après : Détroit, une enquête narrative [The Aftermath City: Detroit, a narrative investigation] (Flammarion), rather than focusing on fictions, she seeks out testimonies and concrete stories, believing that modern times don’t need new narratives. We simply need alternative narratives. Read the transcription of the podcast.

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The potential of the night

Once a sanctuary for dreams and imagination, nighttime has now been relegated to the mere role of a utilitarian prelude to daytime. Nocturnal realms possess an alchemical power capable of transfiguring our perceptions. However, when viewed through the lens of urban uses, the night also exacerbates inequalities and raises questions about the possibility of achieving an urban night that is accessible to everyone. Exploring the range of possibilities associated with the night reveals it as a space-time where complex interactions are woven that could be revitalized through a chronotopic and inclusive architecture.

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Capturing the Cityscape Through Photography

Émilie d'Orgeix, Corinne Feïss-Jehel, Pierre-Jérôme Jehel

Article

Capturing the Cityscape Through Photography

Over the span of several months, students from GOBELINS Paris scouted La Défense, examining the iconic business district from the fresh perspective of urban metabolism. As part of a documentary workshop led by Pierre-Jérôme Jehel and Laetitia Guillemin (GOBELINS) and designed in partnership with researchers from the City-Metabolism Chair at PSL University, some thirty students explored this territory. They did so by treating it not as a mere backdrop but as a living organism, traversed by flows, tensions, and rhythms, using photography as a tool for revelation. Their projects, located at the crossroads of artistic creation and research, unveil an alternative reading of this mineral space, between invisible flows and underlying tensions. Both sensitive and rigorous, this inquiry is chronicled here by Corinne Feïss Jehel (EPHE-PSL), Pierre-Jérôme Jehel, and Émilie d’Orgeix (EPHE-PSL) as part of a research project conducted by the City-Metabolism Chair (which is financially supported by PCA-STREAM, Artelia, and Groupama Immobilier).

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