From single to joint-production under rectangular technology choice
Koslowski, M., Hertwich, E., & Wood, R. (2025). From single to joint-production under rectangular technology choice. Economic Systems Research, 37(2), 276–305. https://doi.org/10.1080/09535314.2024.2445717 Abstract Unlike conventional input–output impact analyses based on matrix inversion, the optimisation-based rectangular-choice-of-technology model (RCOT)
Declining demand and circular transition possibilities of sand, gravel and crushed stone in China
Ren, Z., Jiang, M., Behrens, P. et al. Declining demand and circular transition possibilities of sand, gravel and crushed stone in China. Nat Commun 16, 9294 (2025). https://doi.org/10.1038/s41467-025-64349-3 Abstract Aggregates (sand, gravel, crushed stone) make up half of all globally extracted materials and present substantial environmental challenges. China,
Stefan Pauliuk receives the 2025 BrightCon award for Open Sustainability
October 2025 — Professor Stefan Pauliuk of the University of Freiburg has been awarded the 2025 BrightCon Award for Open Sustainability, a prestigious recognition of his outstanding contributions to open access data, models, and teaching materials in the fields of industrial ecology and socio-metabolic research. The award, presented at the annual BrightCon Conferenc
CIRCOMOD partners’ new Nature Communications paper on circular transition of aggregates in China
We are delighted to share that Dr. Meng Jiang (NTNU), Paul Behrens (Leiden University), Edgar Hertwich (NTNU) and their international colleagues have co-authored a new paper published in Nature Communications: Declining demand and circular transition possibilities of sand, gravel and crushed stone in China Understanding the material future of the construction sector
Building a circular future: How policies, measures, and models can drive the Green Transition
By Patricia Fortes, NOVA University of Lisbon, and Marianne Zanon Zotin, Utrecht University The words circular economy are now everywhere, from policy speeches in Brussels to sustainability pledges by global companies. But what does it really mean to move away from a “take–make–dispose” model, and how can this transition help us tackle climate change? The [&he
Fresh impulses for life cycle sustainability assessment at Pforzheim
Pforzheim University of Applied Sciences took center stage as the lead organizer of the 20th Ökobilanz-Werkstatt, held from 24–26 September 2025. As host, the university — specifically its Institute for Industrial Ecology (INEC) — coordinated this annual conference dedicated to Life Cycle Assessment (LCA) and sustainability evaluation. Under the theme “From L