According to a new study, the world is still a long way from achieving the United Nations' Sustainable Development Goals. Sweden is in the best position, according to the report published by the Bertelsmann Stiftung and others. The study compared 149 countries. Sweden is closest to the goals, followed by Denmark and Norway. Germany came in sixth place. The UN Sustainable Development Goals are intended to help combat extreme poverty, climate change and discrimination by 2030.
The study was produced in collaboration with the renowned economist and UN special advisor Jeffrey Sachs and the United Nations Sustainable Development Solutions Network (SDSN). It was presented at a United Nations sustainability conference in New York on 20 July and handed over to UN Secretary-General Ban Ki-moon.
"I am certain that the SDG Index from SDSN and the Bertelsmann Stiftung will make a valuable contribution to making the world a more peaceful, just and sustainable place."
In Zurich on 30 November 2008, it was approved by a 76 per cent majority that energy consumption should be reduced to 2000 watts of power per capita by 2050. The value in Switzerland is currently 6000 watts on average. The 2000-watt society has since been enshrined in the municipal code. "What is particularly special is how this is to be achieved," says economist Angelika Zahrnt (honorary chair of the environmental association BUND, former member of the Council for Sustainable Development and expert on the post-growth debate).
Zurich's city leaders explain that the 2000-watt society cannot be achieved through technical progress and more energy-efficient appliances alone. Progress also leads to the well-known rebound effect - increased efficiency often motivates consumers to consume more because of cost reductions. Often, more and larger appliances are then used and the savings are partially cancelled out. Even a switch to renewable energies alone does not help. According to the city of Zurich, "sufficiency is needed. That means using less energy, material and space and using resources more sparingly". As one of the few cities worldwide, Zurich is thus anchoring the question of what is the right measure in its policy.
BN - Is the roof of my house or company building suitable for a photovoltaic system or a solar thermal system? This question can now be answered quickly and conveniently online with the help of the new solar roof cadastre of the city of Bonn. In a building-specific map display, a coloured marker indicates whether and to what extent a roof is suitable for energy generation by means of solar power. Step by step, further information, for example on the economic efficiency, can be retrieved via a yield calculator.
The suitability of the roofs of all 129,000 buildings in the city for solar energy generation was recalculated using the latest, improved data. For this purpose, elevation grid data was used, which was determined by the district government of Cologne by means of laser scanning in spring 2016. Compared to the previous version from 2010, the new Bonn solar roof cadastre features, among other things, a fourfold higher resolution and a more differentiated designation of the roof areas.
The suitability of the roof surfaces for electricity generation via photovoltaic systems as well as for domestic water heating and, for the first time, also for supporting building heating via solar thermal collectors was calculated. The calculations also took into account the current changes in the framework conditions with regard to feed-in tariffs and self-consumption of generated solar power.
How the application works
In the city map, the installable system size and many additional data such as yields and savings potentials can be displayed for each building. In a newly developed yield calculator, costs and yields can be calculated and compared by entering additional user-specific information such as electricity consumption or household size. In this way, every owner can quickly gain an overview of the suitability of his or her building for the use of solar energy. Detailed instructions are available at www.bonn.de/...solardachkataster.php.
The City of Bonn points out that the information from the solar roof cadastre is an initial non-binding assessment. Essential prerequisites for a decision to build a system, such as the condition of the roof or the static suitability, can only be clarified by suitable specialist companies or qualified consulting organisations. Information on this can be found on the website of the solar roof register.
Bonn roofs have potential
According to the potential analysis of the solar roof cadastre, 6,800,000 square metres in Bonn are suitable for solar power generation. This corresponds to about the size of 950 football fields. Approximately 800,000 megawatt hours of electricity could be generated on this area. This could cover about 50 percent of the total electricity consumption in Bonn. For solar thermal energy, the result of the potential analysis shows 88,461 buildings in Bonn that could be used for this form of energy generation. This corresponds to about 70 percent of the buildings in Bonn.
In a motion, Bündnis 90 / Die Grünen has called for a stronger focus on building with wood and the use of wood products as insulating materials. There should also be a KfW standard that focuses on building with renewable building materials.
The parliamentary group proposes a model programme for ecological building materials with a volume of 20 million euros. In the KfW Bankengruppe's programmes for new construction and refurbishment, the use of carbon-storing building materials based on renewable raw materials should be given greater support, for example in the form of a KfW Bankengruppe "Efficient House Nature+" standard.
In stark contrast to the political reality, the designs for the WerkBundStadt Berlin are characterized by the longing retro chic of a 19th century bourgeois residential culture.
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According to a new study, the world is still a long way from achieving the United Nations' Sustainable Development Goals. Sweden is in the best position, according to the report published by the Bertelsmann Stiftung and others. The study compared 149 countries. Sweden is closest to the goals, followed by Denmark and Norway. Germany came in sixth place. The UN Sustainable Development Goals are intended to help combat extreme poverty, climate change and discrimination by 2030.
