Kategorie für Blog: New books and studies


Difu report: Major differences in sustainability in German municipalities

The new National Progress Report on the Implementation of the New Urban Agenda shows the state of sustainability in urban development in German municipalities. The report was prepared by the German Institute of Urban Affairs on behalf of the Federal Institute for Research on Building, Urban Affairs and Spatial Development (BBSR).


Fraunhofer ISE short study: Increased construction of large rooftop PV systems with small tilt angles

In a recently written short study, scientists from the Department of Energy System Analysis at the Fraunhofer Institute for Solar Energy Systems ISE prepared an evaluation of the Market Master Data Register (MaStR) and the EEG system master data for photovoltaics (PV). Important findings of the analyses were that with 38 percent of the newly installed capacity, the increase in capacity in Germany is increasingly taking place in the segment of rooftop systems larger than 100 kW, 22 percent of the newly built PV systems are erected in a west, east or east-west direction and 19 percent of these systems have tilt angles smaller than 20 degrees.


Study "Urban Production for a Productive City

In a research project of the iaw, the conceptual foundations of urban production and the productive city were prepared with a view to the situation in Bremen and analysed in their impact structure. The study makes proposals for describing and recording urban production that is compatible with the city and embedding it in an urban development policy model of a productive city. On the basis of seven reference cities (Vienna, Zurich, Stuttgart, Hamburg, Frankfurt am Main, Wuppertal, Bochum), corresponding activities were filtered out and their transferability to the city of Bremen was examined. In the city of Bremen, eight locations and neighbourhoods (including the Tabakquartier and Kellogg-Areal) were examined with regard to their potential for implementing a productive city.


DGNB study: No additional costs for sustainable construction

A new study from Denmark takes a look at the costs of sustainable building construction and shows that more sustainable does not automatically mean more expensive. On the contrary. The study by Buus Consult on behalf of the DGNB system partner from Denmark, the Green Building Council Denmark, now provides clarity. In the study, it takes a close look at 37 DGNB-certified buildings.


What does the EU's CO2 reduction target mean for the German energy transition?

In the context of the Green Deal, the EU's tightened targets on the path to climate neutrality envisage a reduction in CO2 emissions of 55% by 2030 and 100% by 2050. Against the background of these tightened parameters, the question arises as to the impact on the energy transition in Germany. Based on its energy system model REMod, Fraunhofer ISE has calculated the consequences of the new EU targets for the expansion of renewable energies in Germany and now presents the results in a short study.


New DGNB Report on the Sustainable Development Goals

The German Sustainable Building Council (DGNB e.V.) has published a new report explaining how buildings can contribute to the United Nations' global sustainability goals. The publication compares the 17 Sustainable Development Goals (SDGs) with the potential influence of sustainable planning and construction. Architects and planners, as well as building owners and municipalities, are thus provided with orientation as to how they can meaningfully become active in terms of sustainable development. The report also offers a comparison of the SDGs with the criteria of various DGNB certification systems. This shows: Up to 15 of the 17 SDGs are addressed in the context of the DGNB certification of a building project.


Book review "Wohnquartier in Holz - Mustersiedlung in München" DBU Bauband 4

The ecological model settlement on a former barracks site in Munich sets new standards in timber construction. Various timber construction methods and building types up to seven storeys are being tested side by side in eight building projects with the aim of a final scientific evaluation. Timber frame, timber frame and timber hybrid construction methods are being used.


Book review "Commercial buildings in clay and wood - added value through material" DBU BauBand 3

Clay and wood in commercial construction are the exception today. But why? Because it is precisely here that these ecological building materials promise many advantages. The examples presented in this publication have one thing in common: they generate enormous added value through the material used in each case. Sometimes the focus is on flexibility and prefabrication, sometimes on the indoor climate or comfort factors, sometimes on durability, user satisfaction, the CO2 balance, recyclability - and sometimes all of these together.


TRASIQ 2: Transformative strategies for integrated neighbourhood development

Since April 2020, the Öko-Institut has been conducting research into how urban neighbourhoods can be sustainably transformed, using two neighbourhoods in the swarming city of Darmstadt as examples, in the project Transformative Strategies for Integrated Neighbourhood Development (TRASIQ 2). The Federal Ministry of Education and Research is funding the project, which is led by the Öko-Institut and involves the City of Darmstadt, the Institute for Regional and Urban Development Research (ILS) and the "Team Ewen" agency.

Mobility, heat and living space

The project focuses on the research topics of mobility, heat supply and efficient use of living space. Heat supply is an important key to climate-friendly living. How and where, for example, can district heating be expanded in existing properties? How can we increase the share of renewable energies in the heat supply? The size of the living space also contributes to how environmentally friendly a person lives. What needs to be done to ensure that people have the living space they need in their particular phase of life through intelligent apartment swaps? How can neighbourhoods be redesigned so that residents can organise their mobility ecologically?


BUND research award for dissertation on "Transparency in rent increases after energy-related renovations".

Dr. Kirsten David, a researcher at HafenCity University (HCU) Hamburg, has developed an innovative method for determining rent increases after energy efficiency measures: By means of functional cost splitting, rent increases become appropriate and comprehensible. The planning of the energetic measures is also ecologically optimized. For her dissertation entitled "Functional Cost Splitting for the Determination of Rent Increases after Energy Efficiency Measures", the scientist today receives the "BUND Research Award 2020". With the research award, the Bund für Umwelt- und Naturschutz (BUND) honors scientific work on sustainable development.


Wuppertal Institute study presents key points for 1.5 degree target

Glaciers are melting, sea levels are rising, heat waves and heavy rainfall are increasing: The consequences of climate change are visible and tangible worldwide, and the window of opportunity to act is shrinking. In order to significantly limit the global effects of climate change, the emission of greenhouse gases on earth must be drastically reduced. The agreement reached by the international community in Paris in 2015 sets the goal of limiting global warming to well below 2 degrees Celsius, but preferably to 1.5 degrees Celsius. Now, the Wuppertal Institute presented a study with possible cornerstones that can help to achieve the 1.5 degree target by 2035. The study shows that a climate-neutral energy system by 2035 is very ambitious, but in principle feasible, provided that all possible strategies from today's perspective are bundled. This requires, above all, bringing forward and intensifying measures that are described in many studies as necessary to achieve greenhouse gas neutrality by 2050.


BBSR publication "Social Mix and Good Neighbourhoods in Newly Developed Neighbourhoods".

Cover: BBSR, 2020The Institute for Urban Planning and Social Research WEEBER+PARTNER (Stuttgart) examined 16 case studies and interviewed responsible persons in municipal, cooperative and private housing companies. The projects are characterized by a wide range of planning and construction approaches. According to the study, social diversity requires structural diversity: Rental, social and owner-occupied apartments of different sizes and with diverse layouts were created in the new housing quarters. They are socially mixed - even within buildings - with the respective proportions in the neighbourhood being derived from local requirements. The new quarters also offer space for communal forms of living, for example for older people and those in need of care. And they are characterised by an attractively designed and green residential environment. Concept awards promote the planning and implementation of such projects: Through them, plots of land are not allocated according to the highest price, but for the best concept.


BBSR publication on concept awards in neighbourhoods

Cover image: BBSR, BMIConceptual procedures are increasingly establishing themselves as a further instrument of municipal land policy for locations with development potential. Here, the property is not allocated according to the highest price, but according to the concept that promises the most sustainable approaches to the further development of the neighbourhood. In this way, the procedures offer municipalities approaches to solving two current and urgent problems: the need for high-quality urban development and affordable housing.


DIW-Wärmemonitor: German households heat slightly less - CO2 emissions hardly fall at all

© DIW Berlin Annual DIW Heat Monitor based on data from energy service provider ista Deutschland GmbH: Heating energy demand in residential buildings declines again for the first time since 2015 - Rising prices, however, cause heating expenditure to increase by 2.4 percent - CO2emissions have fallen by 21 percent overall since 2010, but by only 2.6 percent when adjusted for temperature - Energy-efficient renovation in residential buildings almost stagnant


New FNR study on the market potential of hardwoods

A study funded by the Federal Ministry of Agriculture determined the potential of hardwood as a substitute for coniferous wood. The results of the study are now available in a brochure published by the Fachagentur Nachwachsende Rohstoffe e. V. (FNR). There is considerable potential for hardwood to be used in industrial timber, but it cannot yet be a substitute for softwood in construction


PV additions: Nuremberg and Hanover are ahead!

Good news for the PV industry: The solar cap will be abolished and solar expansion will be further promoted. The photovoltaic potential in Germany is enormous - especially when it comes to using roof space on new buildings. The new LichtBlick SolarCheck now shows in detail how well the 14 largest German cities are currently exploiting this potential. Enormous differences are revealed: While Nuremberg (49.1%) and Hanover (46.8%) exploit almost half of their potential, Munich and Düsseldorf do not even reach the 10 percent hurdle. The absolute taillight: the Hanseatic city of Hamburg with only 7.2 percent - one more reason for the solar obligation for new buildings planned by the mayor's office.


BUND: Climate crisis accelerates man-made water crisis

June 20 is the beginning of summer and in many places drought and low water levels in the rivers are already the order of the day, the waters in Germany are not equipped against the effects of climate change. In view of the devastating conditions of many waters in Germany, BUND demands a paradigm shift in the way we deal with our waters: The overriding principle in times of climate change must be to keep water in the landscape and return streams and rivers to their natural dynamics within their floodplains. Only just under eight percent of rivers and streams in Germany achieve the good ecological status required by the European Water Framework Directive. Almost 40 percent of surface waters across Europe are polluted by a variety of stressors such as climate change, nutrient inputs from agriculture or straightening. "We continue to heat up the earth, at the same time we drain the landscape. That's why it's no surprise that our local waters are doing so badly," stresses Olaf Bandt, Chairman of BUND, referring to a recent evaluation by BUND on the effects of climate change on water bodies.


Status report 2020 on timber construction in Germany published

The discussion about climate change and the growing demand for living space have increasingly brought timber construction into the focus of planners, architects and developers over the past year. After all, sustainable timber construction can make a significant contribution to climate protection and the creation of living space. The increased interest in timber construction is also reflected in the industry figures: the turnover of companies grew by 7 percent in 2019 compared to the previous year, the number of employees increased from around 68,000 to around 70,000 and the timber construction rate continued to grow in both residential (new construction) and non-residential (new construction) construction.


Difu city survey "Climate protection most important task

Berlin/Cologne. Climate protection and adaptation to the consequences of climate change will become increasingly important for cities. This is one of the findings of the survey of (Lord) Mayors of large German cities* conducted by the German Institute of Urban Affairs in January and February 2020. Almost two-thirds of the respondents named climate protection as an important municipal issue for the future. This means that the number of mayors who attribute an increase in importance to this field of municipal policy action has more than tripled compared to the previous year. Future surveys will show how strongly this result was influenced by the protests of the 'Fridays for Future' movement.


Post-Corona Study: Green Marshall Plan for Germany

A study by the Forum for an Ecological-Social Market Economy on behalf of Greenpeace (March 2020).

As a result of the Corona crisis, the state will implement emergency aid and far-reaching stimulus measures of historic proportions. While the focus is on health and short-term support for workers and businesses, the mistakes of past economic crises must not be repeated. The planned aid for an economic reboot can set the course for the necessary transformation. A number of examples illustrate how short-term economic support can be reconciled with long-term social priorities.


"Climate neutrality in urban neighbourhoods" in the issue "Ökologisches Wirtschaften 3/2019".


Research has identified neighbourhoods as an important level of action for climate protection. For this reason, the BMBF, BMU and Federal Ministries of Construction and Transport have funded several research projects on sustainable neighbourhoods, which are now being processed. The consensus of the research projects presented and the funding bodies is that "it is important to economically research neighbourhood concepts for a climate-friendly heat and power supply as well as an environmentally friendly mobility offer" and "to sensibly link the individual elements in the sense of a functioning sector coupling.

The focus articles of the issue "Ökologisches Wirtschaften 3/2019" show on the one hand the potentials of the neighbourhood approach for the implementation of climate protection measures, but also present best practice examples and discuss the feasibility in practice.


Berlin Senate adopts "Solarcity Master Plan

From the March 10, 2020 meeting of the Senate:

The Senate today adopted a comprehensive catalogue of measures to accelerate the expansion of solar energy in Berlin, based on a proposal by Ramona Pop, Senator for Economic Affairs, Energy and Industry.

Senator Pop: "The potential study for the Solarcity master plan has shown that we can harvest 25 percent of electricity generation with solar energy from the roofs of Berlin. To achieve this, we must accelerate the expansion of solar energy in the city. It is necessary for the federal government to finally improve the legal framework for solar energy in cities. Nevertheless, we want to actively use the existing leeway at the state level. With the Solarcity Master Plan, we will expand information and advice, set incentives and also examine regulatory instruments. The implementation of the Solarcity Master Plan is a joint task for the Senate, but also for all Berlin stakeholders from business and society."


Book publication "Post-growth city".

Contours of a solidarity-based urban policy

Anton Brokow-Loga (ed.),
Frank Eckardt (Ed.)

Cities without growth - a vision hardly imaginable so far. But climate change,
waste of resources, growing social inequalities, and many other
Future threats are fundamentally calling into question the previous panacea of growth. How do we
we live together today and tomorrow? How do we design a good life for everyone in the city?


KfW presents SDG mapping of its new commitments in 2019

  • Over EUR 28 billion for "climate protection measures": KfW is one of the most important supporters of the Paris climate goals
  • Promotional bank is a global pioneer with its standardised SDG mapping
  • Strong international interest in KfW SDG mapping

KfW is today publishing the results of the SDG mapping of new commitments throughout the Group in 2019. In order to clarify the individual contribution made by KfW's new commitments to achieving the UN Sustainable Development Goals, KfW has developed a standardised procedure: 1,500 indicators are used each year to determine to which SDGs KfW's new commitments can be assigned. This makes the contribution transparent at both group and business sector level.


Economists call for more public housing

The federal government can give new impetus to public housing construction in Germany in the short term and thus help to ease the acute housing shortage in many major cities. The key to this is three federally owned companies that provide flexible support to Länder and municipalities in the development of construction projects and the construction of new housing: First, a consulting company that provides planning capacity to cities and municipalities. Second, a land fund that provides financial and conceptual assistance to municipalities nationwide in acquiring building land and financing infrastructure. Third, an investment company that strengthens the equity of municipal housing companies through financial participation. This is shown by Prof. Dr. Sebastian Dullien, Scientific Director of the Macroeconomic Policy Institute (IMK) of the Hans Böckler Foundation and Prof. Dr. Tom Krebs of the University of Mannheim in a new concept for a federal initiative "Future Housing".


Number of electric cars increases worldwide from 5.6 to 7.9 million

More new registrations, growth rate weakened / German manufacturers in 5th and 6th place

In 2019, the number of electric cars worldwide rose to around 7.9 million - an increase of 2.3 million compared to the previous year. The number of new registrations once again reached an all-time high, but grew only slightly compared to 2018. With a total of 3.8 million e-cars, China remains the undisputed global leader. It is followed by the USA with just under 1.5 million. The growth rate of new registrations declined in these two countries in particular. In Germany, on the other hand, the market continued to develop positively, albeit at a lower level: here, just under 231,000 electric vehicles were rolling along the roads at the end of 2019. The new figures come from a recent survey by the Centre for Solar Energy and Hydrogen Research Baden-Württemberg (ZSW). According to the researchers, Tesla recorded the most new registrations worldwide in 2019, with 361,000. German manufacturers continued to improve on the previous year: BMW is in fifth place worldwide with 114,500 electric cars. VW reaches sixth place.


ifeu study "Recyclable Insulation Materials

A research project conducted by natureplus in conjunction with IFEU compares insulation materials with regard to their environmental impact throughout their entire life cycle, including recovery and recycling.

Which insulation material is the best? This question is extremely popular in the construction industry and can ultimately only be answered in the context of the respective construction. In particular, there has so far been a lack of a holistic overview that enables builders and planners to identify the strengths and weaknesses of the various insulation material alternatives in terms of their life cycle assessment, without having to disregard subsequent disposal.


Buildings with wood as a construction material can become a global CO2 sink

27.01.2020 A material revolution that replaces cement and steel with wood in urban construction can have double benefits for climate stabilization. This is now shown in a study by an international team of scientists. First, it can avoid greenhouse gas emissions from cement and steel production. Secondly, it can turn buildings into carbon sinks, since in the construction timber the CO2 is stored. Although the required amount of wood is theoretically available, such an expansion would require very careful sustainable forest management, the authors emphasize.


Climate emergency in Bonn: City presents catalogue of measures

150 concrete proposals are contained in a catalogue that the city of Bonn has compiled in recent months following the declaration of a climate emergency. Many of the measures can be implemented directly by the administration, for others it needs a political decision. At a press conference on Wednesday, 22 January 2020, Lord Mayor Ashok Sridharan and City Planning Officer Helmut Wiesner presented the catalogue of measures.

On 4 July 2019, the Bonn City Council had decided to support a resolution declaring a climate emergency. In doing so, Bonn joined other municipalities in affirming that climate protection must have the highest priority in municipal action. The administration has therefore developed a catalogue of measures in recent months with the participation of all departments.


Agora Energiewende's 2019 Year in Review: Greenhouse gas emissions and coal-fired power generation at record lows in 2019

The share of renewable energies in electricity consumption rises to almost 43 percent. The climate protection successes in the electricity sector are diminished by rising greenhouse gas emissions in buildings and transport. In parallel, public interest in climate protection is rising: since May 2019, it has consistently been the most pressing political issue in the eyes of the population. This is shown by Agora Energiewende's 2019 annual evaluation.


Designing outdoor lighting efficiently - reducing light pollution

The illumination of night landscapes by artificial lighting increases globally by about 2 to 6 percent per year, with effects on people and nature. A new guide describes how municipalities can minimize light pollution by making their street and building lighting more efficient. Researchers from the Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB), the Federal Agency for Nature Conservation (BfN) and the University of Münster have now jointly published the guide on redesigning and retrofitting outdoor lighting.


Newly published: Handbook "Urban Production

The aim of the handbook is to provide municipal actors with concrete tools that can be used to keep and locate production in urban areas. In the joint project UrbaneProduktion.Ruhr, funded by the Federal Ministry of Education and Research, research was carried out from October 2016 to December 2019 into whether and how it is possible to bring production back to the city.