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Der Flächenverbrauch und die Versiegelung nehmen seit Jahrzehnten in Österreich zu und zerstören wichtigen Boden und dessen Funktionen. 2020 wurden 39 km2 Fläche verbaut und davon zirka 41 % versiegelt (vgl. Umweltbundesamt 2021b). Fast ein Viertel dieser Fläche wird für Betriebsflächen genutzt. Der Versiegelungsgrad bei Betriebsgebieten liegt bei 60 % (vgl. Umweltbundesamt 2021a) und somit muss hier angesetzt werden, um die Auswirkungen vor allem der Bodenversiegelung zu reduzieren (vgl. Umweltbundesamt 2021b).Die Diplomarbeit behandelt die Steuerungsinstrumente zur Umsetzung von ökologischen Maßnahmen. Das Ziel der Arbeit ist es aufzuzeigen welche Instrumente für eine ökologisch nachhaltige Standortentwicklung von Betriebsgebieten bestehen und wie diese optimiert und implementiert werden können, um eine Verbesserung zu erreichen. Neben der Analyse der bereits bestehenden Steuerungsinstrumente in Oberösterreich werden auch Instrumente aus anderen österreichischen Bundesländern und Deutschland betrachtet. Oberösterreich zeichnet sich durch seine interkommunalen Betriebsgebiete (INKOBA) aus, die durch die Zusammenarbeit der Gemeinden für diese Arbeit ein wichtiges Instrument sind. Nach dieser Analyse folgt eine Darstellung von Best-Practise-Beispielen aus Österreich, Deutschland und der Schweiz. Die Beispiele wurden großteils durch das Engagement der beteiligten Akteur:innen und durch den konsequenten Einsatz der Planungsinstrumente umgesetzt. Auf diesen Erkenntnissen werden Handlungsempfehlungen für die Verbesserung der ökologischen Standortentwicklung bei Betriebsgebieten entwickelt. Diese Empfehlungen werden anhand zweier Betriebsgebiete beispielhaft aufgezeigt.Die Schlussfolgerung ist, dass es bereits Steuerungsinstrumente in Oberösterreich gibt, die jedoch weiter ausgebaut, nachgeschärft und vertieft werden müssten, um die dringend notwendigen ökologisch nachhaltigen Wirkungen zu erreichen. Dies beginnt beim Land mit der Novellierung des Raumordnungsgesetzes über die Gemeinden, die Maßnahmen in ihren Bebauungsplan aufnehmen und endet bei Betrieben, die ökologische Standortentwicklung freiwillig umsetzen. Nur durch maximale Anstrengungen aller Parteien kann eine nachhaltige Standortentwicklung in Zukunft gewährleistet werden. For decades land use and ground sealing have been increasing in Austria which is heavily influencing soil functions. In 2020, 39 km2 of surface area was additionally consumed and about 41 % of it was sealed (cf. Umweltbundesamt 2021b). Almost a quarter of this area is used for operating areas. The degree of sealing in operating areas is especially high with a value of about 60 % (cf. Umweltbundesamt 2021a). Therefore, this is an important aspect to reduce the effects of soil sealing in particular (cf. Umweltbundesamt 2021b).This diploma thesis deals with control instruments for the implementation of environmental measures. The aim of the work is to show which instruments already exist to ensure an ecologically sustainable location development of business parks and how these concepts can be optimized and implemented to achieve an improvement. In addition to the analysis of existing control instruments in Upper Austria, instruments from other Austrian federal states and Germany are also discussed. Upper Austria stands out by its inter-municipal operating areas (INKOBA), which are cooperations between communes. This analysis is followed by best practice examples from Austria, Germany and Switzerland. These examples have been implemented by the commitment of the actors involved and by the consistent use of state-of-the-art planning instruments. Based on these findings, recommendations for action are developed for future improvements in the ecological site development in business parks. These recommendations are exemplified based on two operating areas.Concluding, there are already governance instruments implemented in Upper Austria, however, these need to be further developed, sharpened and deepened in order to achieve the urgently needed impacts. These changes start in the federal state with the amendment of the Spatial Planning Act, goes on with to the municipalities, which need to include measures in their plans, and ends with businesses that have to implement ecological measure voluntarily. Only maximum efforts by all parties can ensure sustainable site development in the future.

In den letzten Jahren konnte in Deutschland eine "Renaissance der Kohle-Kraftwerke" festgestellt werden. Verbunden mit dem nahenden Ausstieg aus der Kernenergie, stellt dies den deutschen Elektrizit��tssektor vor gro��e Herausforderungen hinsichtlich der geplanten Reduktion der CO2-Emissionen. Zwar werden gro��e Hoffnungen in den Ausbau der regenerativen Technologien gesetzt, allerdings wird in der n��heren Zukunft noch ein Gro��teil der ben��tigten elektrischen Energie durch die Erzeugung aus fossilen Energietr��gern bereitgestellt werden. Au��erdem ist f��r die Gew��hrleistung der Versorgungssicherheit weiterhin eine betr��chtliche Engpassleistung der kalorischen Kraftwerke bzw. der Pumpspeicherkraftwerke notwendig. In diesem Zusammenhang stellt sich die Frage, wie sich ein verst��rkter Ausbau der Erdgas-Kraftwerke, statt der Braun- bzw. Steinkohle-Kraftwerke, auf die Systemkosten bzw. CO2-Emissionen (daraus folgend den CO2-Vermeidungskosten dieser Energietr��ger-Substitution) von Deutschland und ��sterreich der n��chsten Jahre auswirkt. F��r die Beantwortung dieser Frage wurde ein Optimierungsmodell des Elektrizit��tssektors von Deutschland und ��sterreich entwickelt, das auf der Basis der Kraftwerkseinsatzplanung und vorgegebener Investitionspfade die Berechnung der j��hrlichen Kosten und CO2-Emissionen dieses Sektors bis 2030 erm��glicht. Durch die Variation der Schwerpunkte der Ausbaupfade (Basis-Referenz-, Kohle-, Gas- und Uran-Szenario) wird dabei die Betrachtung unterschiedlicher finanzieller und ��kologischer Auswirkungen erm��glicht. Die Modellergebnisse zeigen, dass der verst��rkte Einsatz von Erdgas-Kraftwerken, vor allem GuD-Kraftwerken mit KWK, anstatt emissionsreicher Kohle-Kraftwerke bis 2030 aus klimapolitischer Sicht durchaus sinnvoll erscheint. So k��nnen insgesamt etwa 275 Mio. t CO2 bis zum Jahr 2030 eingespart werden und der CO2-Emissionsfaktor des Jahres 2030 um rund 60 kg/MWh gesenkt werden. Dabei liegen die errechneten CO2-Vermeidungskosten in der H��he von 25 EUR/t teilweise sehr deutlich unter den derzeitigen Vermeidungskosten vieler regenerativer Stromerzeugungsanlagen. Dennoch ist das CO2-Vermeidungspotential begrenzt, weshalb langfristig der Ausbau der erneuerbaren Energiequellen davon unbeeinflusst forciert werden sollte, um substantielle CO2-Reduktionen zu erreichen. Es bleibt jedoch offen, ob die erh��hte Abh��ngigkeit von Erdgas durch den verst��rkten Einsatz in der Stromerzeugung aus strategischer Sicht w��nschenswert ist. Au��erdem stellt sich die Frage, wie dies den Einsatz der umstrittenen Schiefergas-F��rderung (Fracking - nach dem Vorbild Nordamerikas) in Europa beeinflussen w��rde und ob diese aus ��kologischer Sicht vertretbar ist. In the last years "dash for coal" has been observed across Germany. Coupled with the phase-out of nuclear energy, this is a major challenge for German electricity production, with respect to its CO2- emission reduction targets. Despite of the deployment of renewable energy generation technology in recent years, the majority of the electrical energy in the near future will still be provided by fossil fuels. In addition, a significant capacity of flexible thermal power plants and pumped storage power plants is also necessary to ensure the security of electricity-supply. This raises the question how an increased development of natural gas power plants instead of the lignite- or coal-fired power plants effects the system costs and CO2-emissions and consequently the CO2-abatement-costs. To answer this question, an optimization model of the electricity sector in Germany and Austria was developed. Based on a dispatch model and various investment scenarios the annual costs and CO2-emissions from this sector were estimated until 2030. The variation of the expansion-paths (base-reference-, coal-, gas- and uranium-scenario) leads to different financial and environmental impacts. Model results suggest that the increased use of natural gas fired power plants, especially combined cycle power plants with cogeneration, rather than emission-intensive coal-fired power plants, appears, by 2030, to be quite reasonable. This shift from coal to natural gas enables lowering the total CO2-emissions of about 275 m. t CO2 by 2030 and the CO2-emission-factor of 2030 will be reduced by around 60 kg/MWh. Estimated CO2-abatement-costs of around 25 EUR/t are lower than those of many renewable energy generation facilities. Nevertheless, the CO2-abatement-potential is limited. Therefore the development of renewable energy sources should still be pursued to reach emission reduction targets. However, it is unclear whether the increased use of natural gas power plants and the dependence on this energy source is desirable in Germany and Austria. Additionally the question remains how the increased use of natural gas influences the deployment of the controversial shale gas extraction in Europe.

This study focuses on the evaluation of impacts of the European Emissions Trading Scheme (EU ETS) on the emissions position of waste incineration plants and the evaluation of useful flexible mechanisms according to the Kyoto Protocol with the aim of pushing the cost efficient reduction of greenhouse gases in those installations. The knowledge of climate affecting greenhouse gases, of energy efficiency potentials and of the relevance of different energy efficiency measures is essential for an in-depth evaluation.Therefore, a methodology for the determination of the relevance of different energy efficiency measures has been developed in connection with an evaluation of the current state of art. The methodology is based on a matrix determination. The results of Wünsch (2011), regarding specific energy efficiency measures, and their related implementation costs have been considered in order to deduce the cost efficiency of different measures, which is essential for the determination of EU ETS impacts on waste incineration plants and the realisation of projectbased mechanisms.According to this evaluation, climate affecting CO2 emissions in the range of 6.9 million Mg to 10.4 million Mg are caused by the incineration processes in German waste incineration plants.This means a share of 1% of total CO2 emissions in Germany. Most of the German wasteincineration plants are operated by strongly reduced amounts of fossil fuels as most technical configurations are based on the use of steam that is generated by the incineration process. The use of steam inside the installation boundaries results in lower energy deliveries to public districtheating systems and a reduced substitution of fossil fuels outside the installation boundaries. However, it leads to higher utilization ratios for those installations that are not connected to public district heating systems. CO2 emissions caused by waste incineration plants mainly result from the transformation of the carbon content of wastes to carbon dioxide during the incineration process. Climate affecting CO2 emissions from the incineration process could only be reduced by waste containing less carbon. Hence, the reduction potential of direct CO2 emissions in waste incineration plants is limited.However, there are more essential potentials regarding the energy delivery to public district heating systems or other steam/heat consuming plants and installations and, related to this, the substitution of fossil fuels. Beside the increasing connection to public district heating systems, heat recovery for drying sludge or wood could be a sensible technical concept in order to ensure efficient energy generation with those fuels with higher water content.Although a lot of technical energy efficiency measures have been conducted in waste incineration plants in the past, GHG emissions could be reduced by 2.1 to 4.1 million Mg CO2e/yr according to the results of this study. Wünsch (2011) has shown a further GHG reduction potential by energy efficiency measures which were explored in his study.The energy efficiency measures considered have been categorised by their reduction potential and their need for realisation. Based on available data, the following measures show the highest potential: heat recovery from waste gases emitted to the atmosphere, increase of the energetic utilization and boiler efficiency.Continuous emissions metering systems are available on the market and can provide reliable data for CO2 emissions. But only the total amount of CO2 emissions can be measured. The share of climate affecting and climate neutral CO2 emissions cannot be determined by those measurements. Hence, the evaluation of climate affecting CO2 emissions which are relevant for an emissions trading scheme can not be conducted with reasonable costs and effort. The results of this study show significant gaps between measured, flat-rate values (50% of total CO2 emissions) and CO2 emissions that are calculated by standard emission factors derived bysampling analyses. Hence, an installation specific evaluation of the biogen share of waste by regular samplings and analyses of the heating value would be necessary. Since waste is a very inhomogenous fuel, ensuring representative data through monitoring and sampling would be a very ambitious procedure.Because of the waste disposal law in Germany and the dependancy on treated waste amounts and waste compositions, positive and negative financial effects of a free allocation of certificates can occur which cannot be influenced by the operator. If free allocation shall be continued in further trading periods, a specific solution for waste incineration plants must be implemented that considers the waste disposal law. This could be managed by, for example, the allocation of certificates based on one tonne of treated waste with due regard to the waste’s composition. This would lead to specific allocation procedures for waste incineration plants implemented inthe European Monitoring and Reporting Regulation.The reduction potentials of direct CO2 emissions in waste incineration plants are limited. CO2 emission reductions can only be realised by substituting the fossil energy used for the technical processes. Those reduction potentials are nearly exhausted in German waste incineration plants. Hence, in case of including waste incineration plants in the European Emissions Trading Scheme, operators may not be able to fulfil emission reductions as defined by the European Monitoring and Reporting Regulation. Even if the legislator created exceptions of the yearlyreduction obligations for waste incineration plants deficits of certificates could occur because of the development of waste amounts. Since no credits, that is additional certificates free of charge, can be received for the substituted energy, the current European Emissions Trading Scheme does not deal with the relevant processes in waste incineration plants effectively and does not stimulate emissions reduction measures. However, credits could be generated by the project based mechanisms Joint Implementation (JI), Clean Development Mechanism (CDM) or similar mechanisms which are directly linked to the European Emissions Trading Scheme. If the energy efficiency of waste incineration plants increases, less energy is needed for the installation itself. Hence, additional steam or electricity can be delivered to public district heating systems or the electricity grid and substitutes regularfossil generated energy. The project based mechanisms consider emission reductions caused by the substitution of fossil fuels. But new methodologies would be necessary to regulate the calculation of CO2 emission reductions and the proof of additionality in the case of waste incineration. That means, some efforts and costs before the implementation of the project itself but does not lead to a negative assessment of those mechanisms. But even if you do not consider regular operation and maintenance costs the waste incineration process is too expensive compared to landfill gas projects. That is why those projects are widely established in the market of Kyoto mechanism while waste incineration does not play any role. Over the last three years another problem has arisen: the certificate prices. The implementation of project based mechansims and the realisation of CO2 emission reductions measures is closely linked to the actual certificate prices. Reduction measures are going to be realised if additional credits emerge by the generated certificates considering the current fuel prices on the market and an increased energy revenue. Because of the declining certificate prices in the last three years, project based mechanisms have not stimulated efficiency measures in any kind of installation. Additionally, the continuation of those kinds of project based mechanisms is veryuncertain. Hence, there are no alternative mechanisms to stimulate efficiency measures at the moment. The evaluation of climate affecting greenhouse gases caused by waste incineration plants is still difficult since the biogenic ratio of waste can only be determined with higher effort. A reliable data base is necessary for an evaluation of the actual contribution to climate protection and efficiency potentials of waste incineration plants. There is further need for research. If waste incineration plants should be included in the Emissions Trading Scheme, different determination procedures could be combined. For example, the balancing method of the Technical University Vienna could be used as the main determination procedure for the biogenic carbon content of waste. Additionally, the results of the balancing method could be cross-checked by regular chemical determination procedures. With this approach the ongoing monitoring process could be reduced without impacting accuracy requirements, which should bespecifically geared to each plant. The currently established thermal waste treating procedures, in particular waste incineration plants, will also rate highly in German waste management in the future. Due to the high requirements on the substitute fuels used for co-incineration in coal-fired power plants or cement works, considerable amounts of waste flow to the classic waste incineration plants. Hence, the classic waste incineration plants will also be a necessary way of disposal in the future, and energy generated by the incineration process, should be used as efficiently as possible. Efficiency measures must be promoted by appropriate assistance measures because of their usually long payback period. In addition to the primarily targeting aim of waste reduction, thermal waste treatment can ensure the necessary waste disposal guarantee for amounts of waste which can not be avoided or recycled. In order to ensure a treatment of waste with the best available technique, the promotion of energy efficiency measures in the thermal waste treatment sector should be supported. Dissertation, Rheinisch-Westfälische Technische Hochschule Aachen, 2016; Aachen 1 Online-Ressource (202, A1-A38 Seiten) : Illustrationen, Diagramme (2016). doi:10.18154/RWTH-2016-10899 = Dissertation, Rheinisch-Westfälische Technische Hochschule Aachen, 2016 Published by Aachen

Not only up to 1990 the Southern area of Leipzip has been one of the regions of Europe with the most devasting environmental pollution, even today this area is charged with an enormous amount of disused dump. This article checks the main stages of development of this environmental destruction at the field of brown coal in the Borna-Leipzig area during the first half of this century. Lack of raw materials during the First World-War led to an extensive mining of brown coal. In consequence villages were devastate , forests and land available for agriculture had to siappear, the water of rivers and other stretches of water were polluted, the air was charged with dust and toxic material; there was a pronounced leck of fresh water. The environmental pollution in this area grew with notable continuity, regardless of frontiers and political systems. Der Leipziger Südraum gehörte bis 1990 zu den europäischen Gebieten, die die größte Umweltbelastung aufwiesen. Die eingeleiteten Strukturveränderungen seit 1990 verringerten den Ausstoß beträchtlich. Das Industriegebiet bleibt dennoch mit Altlasten umfangreichen Ausmaßes behaftet. Der vorliegende Beitrag beschreibt die Hauptphasen der Entwicklung dieser Umweltzerstörung in der ersten Hälfte des 20. Jahrhunderts. Hauptsächlich die rücksichtslose Ausnutzung der Braunkohle während des Ersten Weltkriegs als Energieträger und Rohstoff für die Chemieindustrie ist für die heute schwierige Situation verantwortlich. Der Autor zeigt, wie die Entwicklung einer Industrieregion eine Eigendynamik entwickelt, die von Grenzen und den jeweiligen politischen Systemen unabhängig ist. Historical Social Reserach Vol. 21, No. 2 (1996)

Arbeitsberichte Verkehrs- und Raumplanung, 269

Die vorliegende schriftliche Ausarbeitung umfasst eine gemeinsame Diplomarbeit von Konstantin Valerian Hirsch BSc und Milorad Racanovic BSc. Der Schwerpunkt dieser wissenschaftlichen Arbeit liegt sowohl auf der Errichtung eines Kulturzentrums für Kinder in nachhaltiger Lehmbauweise als auch auf einer dazugehörigen Dokumentation über den gesamten Projektverlauf.Die Ausführung fand in Kooperation mit der Nubian Vault Association statt. Der Bauherr- gleichermaßen Begünstigter und Betreiber des errichteten Gebäudes - ist die Nongre Craft and Culture Foundation. Im Weiteren wird auf die Entstehung und Themenfindung dieser Diplomarbeit, auf den gesamten Prozess beginnend mit vorbereitenden Maßnahmen, den einzelnen Bauphasen bis hin zur baulichen Gesamtfertigstellung des Kulturzentrums eingegangen.Darüber hinaus werden sämtliche Projektbeteiligte, Problematiken in der Ausführungsphase sowie potenzielle Optimierungsvorschläge beschrieben. Das Bestreben war, durch die o.g. Kooperation neue Erkenntnisse in Bezug auf nachhaltige Lehmbauweise in Theorie und Praxis zu erlangen, diese zeitgleich anzuwenden und auszuwerten sowie einen Leitfaden für zukünftige Bauvorhaben mit Lehm als Baustoff im Entwicklungskontext zur Verfügung zu stellen. The present written elaboration comprises a joint diploma thesis by Konstantin Valerian Hirsch BSc and Milorad Racanovic BSc. This scientific work focuses on the construction of a cultural centre for children using sustainable earthen building methods as well as on the related documentation of the entire project process. The project was realised in cooperation with the Nubian Vault Association. The client, beneficiary and operator of the realised building is the NongreCraft and Culture Foundation. Furthermore, the origin and topic of this diploma thesis, the entireprocess starting with preparatory measures, the individual construction phases up to the overall completion of the building are discussed. In addition, all project participants, problems during the execution phase and potential optimisation proposals are described. The aim of the above mentioned cooperation was to gain new insights into sustainable earthen building methods intheory and practice, to apply and evaluate them simultaneously and to provide a guideline forfuture building projects using earth as a building material in a development context.

Das Prinzip 'Nachhaltigkeit' kann für Unternehmen und Gesellschaft einen wichtigen Beitrag leisten, den aktuellen Herausforderungen zu begegnen. Das Prinzip bedarf aber der Konkretisierung, um einerseits die spezifischen Bedingungen der Landmaschinenbranche abzubilden und um es andererseits 'operabel' zu machen. Das ISO/TC 23 hat deshalb beschlossen, einen Management-Standard zu erarbeiten, um Unternehmen eine Hilfestellung bei der Implementierung des Nachhaltigkeits-Prinzips zu geben und mit der Veröffentlichung einer internationalen Norm eine einheitliche Vorgehensweise weltweit in der Landtechnik zu unterstützen und damit auch die Akzeptanz in den einzelnen Märkten zu erhöhen. The principle of sustainability can contribute to the actual challenges for enterprises and societies. However, the principle needs to be put into concrete terms in order to reflect the specific conditions of the agricultural machinery industry and to be made 'operable'. Therefore, ISO/TC 23 decided to develop a management standard in order to assist the agricultural machinery industry when implementing this principle and to support a uniform approach worldwide in the field of agricultural machinery and to achieve acceptance in the individual markets. Jahrbuch Agrartechnik, vol. 25. 2013Jahrbuch Agrartechnik 2013, vol. 25.2013, p. 13

Die agrarische Produktion beruht auf den Einsatz des begrenzten Faktors technischer Energie, woraus sich die geforderte Energie - und Kraftstoffeffizienz ableitet. Der technische Fortschritt und dem wachsenden Bewusstsein Energie zu sparen sind Triebfedern die Energieeffizienz in der agrarischen Produktion zu verbessern. Der Einsatz von alternativen Energieträgern wie Pflanzenkraftstoffe und Biogas aus der kaskadischen Nutzung stellt einen bedeutenden Beitrag um die Abhängigkeit von fossiler Energie im Landwirtschaftssektor zu mindern. Agricultural production is based on the use of the limited factor technical energy, which leads to the necessity of energy- and fuel efficiency. The technical progress and the increased awareness of saving energy are important promoters to improve the energy efficiency in agricultural production. The application of alternative energy carriers like plant-based fuels (biofuel) and biogas from multipurpose utilisation is a significant contribution to mitigate the dependence from fossil energy in agriculture sector. Jahrbuch Agrartechnik, vol. 24. 2012Jahrbuch Agrartechnik 2012, vol. 24.2012, p. 230

The 7th meeting of the “Section Forest Genetics/Forest Tree Breeding” and the German Dendrology Society (DDG) took place in Ahrensburg/Schleswig-Holstein from September 12–14, 2022. The focus of the three-day lecture event was on "Contributions of Forest Plant Breeding and Forest Genetics to the Forest of Tomorrow". There was more than enough reason for the conference. Climate change is becoming more and more obvious. The effects of the excessively dry and warm years in large parts of Germany pose challenges for forest owners and managers. With the meeting we tried to answer some of the questions. At the conference, 51 presentations were given, which were assigned to 10 blocks: Methods, Resistance, Woody Plant Physiology I and II, uropean Beech, Breeding, Differentiation, Alternative Tree Species, Red Oak and Forest Reproductive Material. The conference ended with a half-day excursion to a 60-year-old stand of Monarch birch (Betula maximowicziana), a former provenance trial. At the object a lesser-known tree species of East Asia, knowledge and practical experience were exchanged. Another excursion point was a progeny test for use in short rotation set up by the Thünen Institute of Forest Genetics in strips. For the existing silvoarable agroforestry system (trees with arable crops), a concept for a silvopastoral system (trees with livestock) with chickens or calves was developed together with the Thünen Institute of Organic Farming. In preparation for grazing, half of the elevenyear- old woody strips were harvested during winter and used for energy production. The remaining growth as well as that from root shoots and sockers provide shade and shelter for the brother cocks. The meeting is held as part of the Charta für Holz 2.0, which aims among other things to increase the usable forest wood potential. The conference builds on the following priorities in the field of action Resource Forest and Wood of the Charta: • Sustainable wood supply: productivity and management, Cultivation of productive tree species, guarantee the supply of softwood, Forest tree breeding / forest genetics • Conservation through sustainable use: risk minimization (forest conservation, rotation length, forest conversion), adaptation of forests to climate change, crisis management In order to make the results of the event, which was well attended by 85 participants from Germany and Austria, accessible to a broad public, the content of selected presentations is published. The authors are responsible for the content of the ontributions. DOI:10.3220/REP1681451577000

Projektstandort Nantes in Westfrankreich an der Loire: In der Stadt klafft ein Loch zwischen Zentrum und Stadtentwicklungsgebiet, ein aufgelassener Steinbruch trennt das Wohngebiet vom Fluss. Ein Kulturbau kann hier die M��glichkeit schaffen die Stadt zu verbinden und zu einem weiteren Knotenpunkt im Stadtleben zu werden, sowohl kulturell als auch zur Naherholung. Die Oper mit Ihren klassischen sowie modernen Inszenierungen fungiert hier als kulturverbindender Ort, das Geb��ude selbst als Treffpunkt und Br��cke ��ber den unnat��rlichen Gel��ndebruch. Der bestehende Park "Maurice Schwob" der bis zur Kante des Steinbruchs f��hrt, wird in das Geb��udekonzept eingebunden und erstreckt sich ��ber das Opernhaus. ��ber diese erweiterte Gr��nfl��che, jedoch ohne die Oper selbst betreten zu m��ssen, wird ein ��bergang zum Fluss geschaffen und die Barriere des Steinbruchs ��berwunden. F��r ��kologische Nachhaltigkeit sorgen neben der intensiven Begr��nung des Daches als optimale Geb��uded��mmung der angrenzende Fluss zur K��hlung und W��rmegewinnung und zus��tzlich gro��fl��chig Erdw��rme-Fl��chenkollektoren. Um die CO2-intensive Herstellung von Betonmassen zu reduzieren wird, wo m��glich, stattdessen auf Ziegel gesetzt. Granit aus dem Steinbruch selbst wird als n��chstliegende Rohstoffquelle f��r die Fassadengestaltung verwendet. Projected in Nantes, western France, situated at the River Loire: like a hole in the city between city-center and an urban development area sits a quarry which separates the residentail area from the river. A cultural center can create a connection and could become an urban intersection, cultural and for recreation. The opera with classical and modern productions serves as cultural connectionpoint, the building itself as meeting place and bridge over the quarry. The existing park "Maurice Schwob", situated at the top of the quarry, extends over the opera building and becomes a passage to the river Loire without entering the opera itself. The intensive green roof insulates the building, the nearby river serves cooling and heating energy and geothermal energy is also used for heating. To avoid the use of concrete with its high CO2 emissions during fabrication, bricks are used instead. Granite from the quarry itself is used for the facade as most nearby resource.