Category Archives: Material Cycle

Material Footprint Implications of Low-Carbon Technologies

By | 30th October 2022

Energy scarcity and material abundance characterize the current global economy. Demand for energy services in buildings, transport, and industry cannot be met, after Russia’s invasion of Ukraine triggered multiple sanctions and supply chain disruptions for fossil fuels, mainly in Western Europe but also beyond. But even before, energy costs were on the rise due to… Read More »

Scientists Urge to Integrate Energy-Metal Nexus into Carbon Neutrality Pledges

By | 18th June 2022

Carbon neutrality requires systematic transformations and revolutions of both energy and metal systems. Countries, cities, and companies across the world are pledging to become carbon neutral within the next few decades. These will evoke a systematic transformation in all industrial and service sectors, in which the low-carbon transition in the energy system is regarded as… Read More »

Material flow accounting and material footprints: System definition and data sources

By | 20th April 2022

Material flow accounting (MFA) (Fischer-Kowalski et al. 2011) is a method to systematically compile data on the total material use (input) and discards (output) of society/economy. Its system boundaries are consistent with the System of National Accounts and it is an established accounting methodology with a comprehensive database (Resource Panel IRP).  As an accounting scheme,… Read More »

Studie zu Materialverbrauch, Energiebedarf und Klimaauswirkungen des geplanten Stadtteils „Dietenbach“ in Freiburg

By | 17th March 2022

Klimawandel und Wohnungsmangel machen die Untersuchung der Klimaauswirkungen von Neubauprojekten zu einem wichtigen Thema. Der geplante Stadtteil ‚Dietenbach‘ in Freiburg i.Br. soll nach dem Willen des Gemeinderats klimaneutral werden. In der Masterarbeit von Leonid Krebs vom Studiengang Umweltwissenschaften haben wir eine wissenschaftliche Umweltbewertung und Szenarioanalyse von Materialverbrauch, Energieverbrauch und Klimaauswirkungen der Treibhausgas (THG)-Emissionen verschiedener Bauweisen… Read More »

Direct air capture of CO2 – A potential building block but not a wildcard

By | 1st November 2021

As I am writing these lines, the supposed climate leaders of the world meet at the COP 26 in Glasgow to find ways to ramp up their national commitments towards the well below 2°C climate target. Since most of our energy consumption and industrial production still hinges on fossil fuels, the structural changes that lie… Read More »

New Guidelines for Data Modeling and Data Integration for Material Flow Analysis

By | 9th June 2021

Material flow analysis (MFA) is booming. A large number of datasets are being compiled and produced as part of MFA research, but many of them are not available or cumbersome to extract — either because of their format (e.g., pdf), or because they lack systems context. For this reason, researchers often have to spend too… Read More »

Short lifetime of metals in the anthroposphere illustrates the challenge of closing material cycles

By | 7th February 2021

“Metals can be recycled indefinitely.” That marketing phrase of the metal producers sounds plausible, as we simply need to heat up and melt a bunch of scrap metal and cast and then roll or forge it into its new shape. With low-carbon heat, such perfect recycling could even largely eliminate GHG emissions from metal production,… Read More »

Warum ist es so wichtig, Plastikverpackungen zu vermeiden?

By | 13th January 2021

Das frage ich mich allerdings auch! Eine Journalistikstudentin stellte mir diese Frage für ein Feature über plastikfreies Leben. Ich kann diese Frage weder konkret beantworten, weil sie eine vermeintlich richtige Antwort impliziert, die ich nicht kenne, noch unkommentiert stehen lassen, weil sie exemplarisch zeigt, dass sich Nachhaltigkeit (leider) nicht auf einfache Formeln wie ‚plastikfrei leben‘… Read More »

Ist weniger mehr? Wie wir den Klimawandel bremsen können, indem wir Materialien besser nutzen.

By | 18th November 2020

Klimafreundliche Technologien und Lebensstile? Na logo: Elektroautos, Passivhäuser, Solarzellen auf dem Dach, weniger Fleisch, mehr Rad fahren. Als Endverbraucher hat man eine große Auswahl an Möglichkeiten, den Klima-Fußabdruck zu senken. Anderswo ist es nicht so einfach. Teile der Wirtschaft haben große Probleme, auf klimafreundliche Technologien und Prozesse umzusteigen. Dies betrifft insbesondere die Hersteller von wichtigen… Read More »

Introducing ODYM-RECC – A community model for circular economy and material efficiency assessments

By | 11th December 2019

The UNEP International Resource Panel Report (IRP) report on “RESOURCE EFFICIENCY AND CLIMATE CHANGE – Material Efficiency Strategies for a Low-Carbon Future” [1] released in December 2019 is the result of a major collaborative effort among industrial ecology researchers [2]. It features an assessment of the economy-wide impacts of material efficiency in passenger vehicles and… Read More »