The German Environment Agency (UBA) is adopting the IIASA MESSAGEix framework to build up integrated assessment modeling capacity. The framework is primarily used for analyzing and designing energy systems and their interactions with the economy, the environment, and the society. On 10 December 2024, IIASA Director General, Hans Joachim (John) Schellnhuber and UBA representatives signed a Memorandum of Understanding (MoU), paving the way for future cooperation.

The partnership between UBA and IIASA reflects the shared commitment of the two organizations to enhance research-to-policy and science-to-society activities. Through this partnership, they seek to broaden the scope of sustainability analysis possible with the MESSAGEix-framework, we well as share knowledge, ideas, and lessons learned. In addition, IIASA will support UBA in setting up and maintaining the required software-infrastructure for using the MESSAGEix-framework independently.

By leveraging their combined expertise, IIASA and UBA seek to enhance the transparency and the usability of the MESSAGEix framework for new users and stakeholders, including institutions from countries lacking the capability to use the framework without external help.

MESSAGEix is widely recognized for its ability to analyze the interplay between socio-economic and environmental systems, making it a critical asset for policy-driven sustainability research. The modeling framework and the results provide core inputs for major international assessments and scenarios studies, such as the Intergovernmental Panel of Climate Change (IPCC), the Network of Greening the Financial Sector (NGFS), the European Commission, and the Global Energy Assessment (GEA). 

A workshop was organized at IIASA in Laxenburg to kick-start the new partnership. The workshop agenda and the following discussions focused on sufficiency and demand-side modeling, socio- and techno-economic development, macroeconomy, and open science approaches to integrated assessment modeling.

From the IIASA side, the workshop featured Integrated Assessment and Climate Change Research Group leader Volker Krey, Energy, Climate, and Environment Program director Keywan Riahi, and researchers Oliver Fricko, Fridolin Glatter, Aneeque Javaid, Siddharth Joshi, Jarmo Kikstra, Florian Maczek, Alessio Mastrucci, Measrainsey Meng, and Xiaoyang Zhong as speakers.

From the UBA side, Lukas Eggert, Kikan Nelle, and UBA project lead Niklas Roming provided an introduction to UBA’s project goals and a review of the national scenario landscape for Germany.  

UBA is the main environmental protection agency in Germany, which works on a broad spectrum of different environmental issues, including waste avoidance, climate protection, and pesticide approvals.

UBA MoU © IIASA

News

Naturance project logo

04 November 2026

European Commission's CORDIS platform highlights NATURANCE project

Research results from the Horizon Europe project “NATURANCE – Nature for insurance, and insurance for nature” have been highlighted by the European Commission’s Community Research and Development Information Service (CORDIS), the primary platform for sharing the results of EU-funded research and innovation projects. 

decarbonization

24 September 2026

IIASA researcher joins Austrian Academy of Sciences working group on integrated carbon neutrality

On 15 September, Principal Research Scholar Thomas Schinko represented IIASA at a high-level event of the Commission on the De-Fossilization and Carbon Neutrality of the European Energy Systems (DEE) of the Austrian Academy of Sciences (OEAW). The meeting denoted the kick-off workshop of the newly established DEE Working Group "Transsectoral and Transcontinental Integration”.

Person looking at tablet with green dashboard on screen

30 July 2026

The trillion-dollar question behind corporate net-zero pledges

Corporate climate spending now steers trillions of dollars in transition finance worldwide. Does it drive genuine climate action? Research shows that accounting flexibility alone can make a company's reported emissions vary by roughly a factor of two – enough to appear either as a climate leader or a laggard. A new Perspective in Nature Sustainability proposes developing industry-specific net-zero blueprints to close that gap.