BBSR study: CO2-neutral in cities and neighbourhoods
Published
International agreements and implementation programmes to limit climate change will take account of the importance of cities in the CO2-reduction, as solutions that are primarily aimed at the national level dominate. Nevertheless, in some countries, national climate protection targets and declarations of intent (Intended Nationally Determined Contributions - INDCs) are already being consistently broken down to regions and cities.
Since February 2017, the houses of Chiemgauer Holzhaus have been awarded the RAL quality mark GZ 425. The solid wood houses achieve a GWP (Global Warming Potential) value of less than zero in their carbon footprint. This was tested by the "Gütegemeinschaft CO2 neutrale Bauwerke in Holz e.V.".
Taking into account all the necessary materials, such as concrete foundation, roof tiles, glass windows, etc., this means in the case of a solid wood house with approx. 150 m² of living space an CO2 reduction capacity of approx. 23,000 kg!
By comparison, a conventionally built house with bricks and otherwise the same conditions pollutes the environment with 24,000 kg of CO2. (Source: www.chiemgauer-holzhaus.de/
Certification of CO2 neutral solid wood buildings
Every building generates a verifiable "Global Warming Potential" (GWP) during the production of the building materials and during construction, which is primarily caused by the energy consumption during production. The aim of the new quality association is to certify solid timber buildings whose manufacturing energy balance has a GWP value of less than zero. This means that a manufactured solid wood building is at least CO2 neutral, or even has a CO2-reducing effect. For this purpose, the "German Institute for Quality Assurance and Labelling" (RAL) approved the "Quality Mark CO2 Reducing Wooden Structures" in 2015, which is awarded by the "Quality Association CO2 Neutral Structures in Wood". The quality mark has a modular structure and currently includes Part A of the EPDs as a component and basis. As soon as further European-recognised and standardised product indicators are available up to the disposal of a material, the quality mark will be extended with the same criteria in order to ensure a holistic view.
The basis of the "Quality mark for CO2-reducing timber structures" is timber from sustainable forestry. The more wood is used in construction and the more trees are replanted accordingly, the greater the CO2 reduction in our climate, both in the short and long term. The prerequisite for the award of the quality mark is the calculation and documentation of the EPDs as well as external monitoring according to the strict criteria of RAL.
INFOS:
Quality Association for CO2-neutral Buildings in Wood e.V., Munich
Internet: www.wood-co2.eu
Making life in the neighbourhood more ecologically, socially, economically and culturally sustainable together with the residents; that is the aim of "Real-world laboratory 131: KIT finds the city" at the Karlsruhe Institute of Technology (KIT). In Karlsruhe's Oststadt district, researchers in this laboratory are looking for ways to reduce CO2 emissions, conserve resources, strengthen neighbourhoods and improve the health of people in the district. The project has now been honoured twice by the German Council for Sustainable Development (RNE).
"The special thing about this project is that we work directly with the people living and working on the ground at eye level and can therefore not only incorporate specific local knowledge and think ahead. Rather, this makes it possible to take action for sustainable development," says Alexandra Quint from the project team at the Institute for Technology Assessment and Systems Analysis (ITAS). Ways to make neighbourhoods more pedestrian-friendly are being researched, as are new methods for energy-efficient building refurbishment, and services for sustainable living and sustainable mobility behaviour are being developed. The researchers' work is highly interdisciplinary: "Architects, philosophers, landscape planners, cultural scientists, environmental scientists and geoecologists work together in this team," says the urban geographer.
This is not just research, but also very practical work: "For example, there is a newly developed energy concept for increasing the proportion of renewable energies in existing buildings or initiatives for slowing down our increasingly hectic everyday lives," reports Dr Oliver Parodi, Head of Reallabor 131. In the "Beds and Bees" project, citizens and scientists have jointly designed a snack bed with herbs, fruit and vegetables in public spaces and set up a hive as a home for bees. Quint explains that this not only serves to raise environmental and nutritional awareness, but above all to build community. All of this is done in co-operation with civil society groups, the city administration, associations, businesses and, above all, the local citizens who regularly take part.
A series of events also provides approaches and ideas for alternative consumer behaviour. Parodi mentions plant swaps, clothes swap parties and a regular repair café. "Reallabor 131 is designed as a platform for participation and has a strong networking character." The project's own "Future Space for Sustainability and Science", a former shop, combines the characteristics of a neighbourhood office, a science shop and a community centre and is now a popular meeting point, event and educational venue.
According to Quint, the concept is attracting worldwide interest: "The laboratory is a model, is designed to be transferable and has so far been researched by scientists from the Netherlands, Spain and Australia, with requests for cooperation coming from Mexico, Russia, Switzerland, the USA, Estonia, Portugal and Spain."
Honoured as a transformation project
The German Council for Sustainable Development (RNE), which advises the German government on sustainability issues, has now honoured the Reallabor twice: with the "Project Sustainability 2017" seal of quality and as one of four "transformation projects" nationwide. With this seal, the RNE recognises initiatives from society that make a special contribution to sustainable development in Germany and the world. Around 240 projects applied for the award. According to the jury, the transformation projects honoured have particularly great potential to make the world more sustainable. The awards were presented at the end of May at the RNE's annual conference in Berlin.
The website provides information on all the activities of the real-world laboratory: www.quartierzukunft.de
Difu city survey "OB-Barometer 2020" gives municipalities' assessment of the future* 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.
More than half of the respondents also see a growing need for action in the area of mobility. This topic, which already ranked second among the future topics last year, has thus once again gained in importance for city leaders. This may also have something to do with the fact that urban mobility is an essential aspect of municipal climate protection. The top future topic of the two previous years, digitalization, is in third place in the survey among the most important future topics for municipal policy. A good third of respondents believe that digitisation will become more important for cities in the next five years. Other municipal policy issues to which the mayors attach particularly high relevance for the future are the creation of affordable housing, the financial situation of the cities and the strengthening of the economy.
City leaders agree that the future challenges facing cities will require a high level of funding. This is particularly true for the topics of mobility and climate protection. Almost 90 percent of those for whom these are key issues for the future expect to have to make large or very large investments in these areas. The situation is similar in the areas of digitisation and the creation of affordable housing: here, around three quarters of the city leaders who see digitisation and housing among the most important future issues for cities still consider the future financing requirements in these policy areas to be high or very high.
* The survey was conducted before the Corona pandemic in Germany pushed other issues into the background. Even if normality should have returned to some extent in the cities after the state of emergency, the view of the political decision-makers on the municipal world will be different. Difu will therefore publish the full results of the OB-Barometer 2020 at a later date, possibly linked to current surveys that include "Corona aspects". This report therefore focuses primarily on the sub-area of "future issues".
A socially responsible coal phase-out is feasible and affordable, according to a report commissioned by ver.di.
"We expect that in none of the scenarios, even at peak times around 2030, will annual costs of more than 250 million euros be incurred for early retirement, but also for retraining and other career-related measures," explained ver.di Federal Executive Board member Andreas Scheidt.
The Enervis report commissioned by ver.di can be downloaded here as a PDF:
We use cookies to optimize our website and services.
Functional
Always active
Technical storage or access is strictly necessary for the legitimate purpose of enabling the use of a particular service explicitly requested by the subscriber or user or for the sole purpose of carrying out the transmission of a communication over an electronic communications network.
Preferences
The technical storage or access is necessary for the legitimate purpose of storing preferences that have not been requested by the subscriber or user.
Statistics
The technical storage or access, which is solely for statistical purposes.Technical storage or access used solely for anonymous statistical purposes. Without a subpoena, voluntary consent from your Internet service provider, or additional records from third parties, information stored or accessed for this purpose cannot generally be used alone to identify you.
Marketing
Technical storage or access is necessary to create user profiles, to send advertising or to track the user on a website or across multiple websites for similar marketing purposes.
Since February 2017, the houses of Chiemgauer Holzhaus have been awarded the RAL quality mark GZ 425. The solid wood houses achieve a GWP (Global Warming Potential) value of less than zero in their carbon footprint. This was tested by the "Gütegemeinschaft CO2 neutrale Bauwerke in Holz e.V.".
