• ifeu Heidelberg Welcome

ifeu conducts research and provides consulting services worldwide on all major environmental and sustainability issues. With over 45 years of experience, it is one of the leading environmentally focused research institutes in Germany. Our work is characterized by independence, practical relevance, and a goal-oriented approach. ifeu currently employs over 120 staff members from the fields of natural sciences, engineering, and social sciences at its locations in Heidelberg, Berlin, and Hamburg.

We use our scientific expertise and consulting experience to stimulate necessary changes in policy and society and to actively help shape solutions. In doing so, we are convinced that these transformation processes must be carried out in a democratic and socially just manner—at the local, national, and international levels.

On these pages, we provide information about our research and keep you up to date on news from our institute.

In Focus

Latest news

11.11.2026

Bioenergy: Rising demand meets limited raw materials

Wood, energy crops and residues are available in limited quantities and are needed for climate protection, biodiversity and durable products. A brief study by the Öko-Institut, ifeu, IREES and Fraunhofer ISI shows that new legislative frameworks could significantly increase bioenergy demand by 2045, whilst the…

Latest project

August 2026 to May 2027

Further development of the Berlin Energy and Climate Protection Programme 2030 into the Berlin Climate Protection Plan 2027–2031

Shaping Berlin’s Climate FutureThe State of Berlin is transforming the Berlin Energy and Climate Protection Programme 2030 into the Berlin Climate Protection Plan for the 2027–2031 implementation period. This project provides the technical and scientific foundation for the process and supports both the development of…

Latest publication

30.10.2026

Reform der Bundesförderung effiziente Gebäude: Einordnung und Vorschläge zur Anpassung

Wie kann die Gebäudeförderung energetische Sanierungen wirksamer unterstützen und zugleich bezahlbares Wohnen sichern? In einer Kurzstudie im Auftrag des GdW Bundesverband analysiert das ifeu die Reform der Bundesförderung für effiziente Gebäude (BEG) und zeigt insbesondere für Mehrfamilienhäuser und den vermieteten…

Our Topics

Some of our interactive tools

Using the CO2 calculator from the Federal Environment Agency and ifeu, you can work out your CO2 footprint across the categories of electricity, housing, transport, food and other consumption, and see where you can make improvements. The CO2 quick check provides an initial estimate of your CO2 footprint based on 12 questions.

Would you like to know whether your building is already suitable for a heat pump – or what steps still need to be taken to make it so? With our free heat pump building check, you can assess your rooms and radiators and get advice on how to make your building ready for a heat pump.

The Sustainability Check assesses how climate-friendly your behaviour is in the areas of housing, travel and diet. The tool highlights specific areas where savings can be made and provides recommendations for action to help reduce emissions – based on scientific climate targets.

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