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In view of the current geopolitical situation, the EU and its Member States are accelerating efforts to reduce their dependency on fossil fuel imports, while simultaneously tackling the climate crisis. With heating in buildings accounting for a large share of the energy consumption in the EU, policies to phase-out fossil fuels for heating and to switch to renewables are key elements. In the context of the proposed actions to phase-out fossil fuels at EU level, this article provides a systematic analysis of current and planned phase-out regulations for fossil fuel boilers in the EU Member States. The paper quantifies the share of energy consumption for heating that is addressed by such regulations and finds that the current regulations only address about 10% of the total fossil energy consumption for heating in the EU. The share increases to almost 30% when considering the planned regulations, reflecting the fact that large energy consumers such as Germany and the Netherlands have announced such regulations. The analysis shows that several Member States with high energy consumption for heating have neither implemented nor announced plans to introduce phase-out regulations for fossil fuel heating. The study concludes that immediate policy action is needed both at EU and at Member State levels. At EU level, the proposed introduction of an end-date for stand-alone fossil fuel boilers needs to be substantiated and implemented into the legislative framework. At the national level, phase-out regulations for fossil fuel boilers need to be expanded both in quantity and scope.
heating in the EU 04.09.2023 Publikationen Energie & Klimaschutz Bücher

Fossil-based emissions can be avoided by using wood in place of non-renewable raw materials as energy and materials. However, wood harvest influences forest carbon stocks. Increased harvest may reduce the overall climate benefit of wood use significantly, but is widely overlooked. We reviewed selected simulation studies and compared differences in forest carbon and amount of wood harvested between harvest scenarios of different intensities for three different time perspectives: short- (1–30 years), mid- (31–70 years), and long-term (71–100 years). Out of more than 450 reviewed studies 45 provided adequate data. Our results show that increased harvest reduces carbon stocks over 100 years in temperate and boreal forests by about 1.6 (stdev 0.9) tC per tC harvested (referred to as carbon balance indicator (CBI)). CBI proved to be robust when outliers explicitly influenced by factors other than changes in the harvest rate, such as fertilization or increase in forest area, were removed. The carbon impacts tend to be greatest in the mid-term, but no significant difference in was found for average values between short and long time-horizons. CBI can be interpreted as carbon opportunity costs of wood harvest in forests. Our results indicate that even after 100 years, CBI is significant compared to the typical GHG credits expected in the technosphere by avoiding fossil emissions in substitution and increasing carbon stocks in harvested wood products. Our estimates provide typical values that can directly be included in GHG balances of products or assessments of mitigation policies and measures related to wood use. However, more systematic scenarios with transparent information on influencing factors for forest carbon stocks are required to provide better constrained estimates for specific forest types.
on forest carbon 11.06.2022 Publikationen Energie & Klimaschutz Bücher

Fachartikel erschienen in vier Teilen in „sicher ist sicher – Arbeitsschutz aktuell“, Ausgaben September bis Dezember 2014. 1957 wird erstmals ein Reaktor in Deutschland kritisch, seit 1961 wird Strom aus Kernenergie erzeugt. Seitdem ist auf die Frage der Entsorgung der radioaktiven Abfälle eine Antwort zu suchen. Mehrere Anläufe ein Endlager insbesondere für die hochradioaktiven Abfälle zu finden, blieben erfolglos. Die Gründe sind vielschichtig, einer ist sicherlich die fehlende Akzeptanz in der Bevölkerung wie das Beispiel Gorleben zeigt. Mit dem 2013 verabschiedeten Standortauswahlgesetz wurde ein neuer Versuch gestartet. Erstmals wurde im breiten parteipolitischen Konsens ein Verfahren in einem Gesetz verankert, das ausgehend von einer „weißen Landkarte“ stufenweise zu einem Endlagerstandort führen soll. Der Artikel, der in vier Teilen erschienen ist, soll in das Thema einführen. Aufgrund der komplexen Thematik können viele Themen allerdings nur angerissen werden. Eine Auseinandersetzung damit ist aber wichtig, da die Endlagerung eine breite Öffentlichkeit über lange Zeit betreffen wird. Die einzelnen Teile des Fachartikels können unter www.sisdigital.de kostenpflichtig heruntergeladen werden: Ausgabe 09/2014: Teil 1 – Radioaktive Abfälle – Entstehung, Arten und Mengen und Diskutierte Alternativen zur Endlagerung. Ausgabe 10/2014: Teil 2 – Endlagerung – Konzept, Risiken und Langzeitsicherheit. Ausgabe 11/2014: Teil 3 – Die Suche nach einem Endlagerstandort, Historie. Ausgabe 12/2014: Teil 4 – Das Standortauswahlgesetz 2013 und Ausblick.
Entsorgung von Atommüll 01.09.2014 Nukleartechnik & Anlagensicherheit Bücher

The ongoing needs to develop power systems towards more environmentally friendly technologies with respect to climate change in conjunction with the continuous evolution of the respective market conditions is leading to a transition away from the traditional system operation. The upcoming challenges have motivated the development of an increasing number of models for transmission grids. Nevertheless, the high complexity of such models renders it exceedingly difficult to compare their results as well as any corresponding conclusions. In this paper, we develop an open framework to compare a variety of pan-European transmission grid models with a strong focus on the German power system. The comparison is performed in both a qualitative and quantitative manner, depending on the investigated modeling aspect including input data, methods, system boundaries and results. The quantitative model comparison is done by performing harmonized model experiments, one for 2016 as back testing and one for 2030 for analyzing the future system. Core elements of our comparison framework are: We proved that our comparison framework is suitable to make similarities and differences between the different model results visible, e.g. using quadratic heat maps. To ensure transparency and to support the open modeling community, the fact sheets with the model specifications and the database with selected model results are uploaded on the open energy platform.
Publikationen Energiewende und Klimapolitik Energie & Klimaschutz Bücher

The European electricity industry, the dominant sector of the world’s largest cap-and-trade scheme, is one of the most-studied examples of carbon pricing. In particular, numerical models are often used to study the uncertain future development of carbon prices and emissions. While parameter uncertainty is often addressed through sensitivity analyses, the potential uncertainty of the models themselves remains unclear from existing single-model studies. This study investigates such model-related uncertainty by running a structured model comparison experiment, which exposes five numerical power sector models to aligned input parameters—finding stark model differences. At a carbon price of 27 EUR/t in 2030, the models estimate that European power sector emissions will decrease by 36–57% when compared to 2016. Most of this variation can be explained by the extent to which models consider the market-driven decommissioning of coal- and lignite-fired power plants. Higher carbon prices of 57 and 87 EUR/t yield a stronger decrease in carbon emissions, by 45–75% and 52–80%, respectively. The lower end of these ranges can be attributed to the short-term fuel switch captured by dispatch-only models. The higher reductions correspond to models that additionally consider market-based investment in renewables. By further studying cross-model variation in the remaining emissions at high carbon prices, the representation of combined heat and power is identified as another crucial driver of differences across model results.
model-comparison experiment 13.10.2021 Publikationen Energie & Klimaschutz Bücher

Hoping to support sustainability, countries have established policies to foster the bioeconomy (BE), based on the use of biomass and knowledge on biological principles. However, appropriate monitoring is still lacking. We estimate global key environmental footprints (FPs) of the German BE in a historic analysis from 2000–2015 and in projection until 2030. Overall, the agricultural biomass FP is dominated by animal-based food consumption, which is slightly decreasing. The forestry biomass FP of consumption could potentially shift from net import to total supply from domestic territory. Agricultural land use for consumption is triple that of domestic agricultural land (which covers half of Germany) and induced substantial land use change in other regions from 2000–2015. The FP of irrigation water withdrawals has decreased over 2000–2015 and might continue to decline in absolute terms by 2030, but the share of supply regions with water stress might increase. The climate FP of BE contributes 18–20% to the total climate FP of domestic consumption, while employment makes up 10% and value added only 8% of the total German economy. These findings imply that sufficient monitoring of the BE needs to consider both production and consumption perspectives, as well as global FPs of national economies.
German bioeconomy 01.06.2021 Publikationen Energie & Klimaschutz Bücher

Nuclear cultural heritage (NCH) is a relatively new approach. It was introduced by Rindzevičiūtė (2019) and is being discussed internationally with reference to its contribution to knowledge preservation of nuclear objects and practices as well as safety aspects, especially in the context of nuclear waste governance. The latter includes knowledge transfer to future generations in the sense that knowledge of nuclear objects and practices might be further developed and could be applied as well in future. This is particularly relevant as nuclear technology is hazardous to the living environment and endures for very long periods of time. The great impacts on landscapes and the living environment are demonstrated by experiences with nuclear accidents, nuclear weapon tests, the storage and disposal of nuclear wastes, and uranium mining. One reason for the upcoming interest in NCH is the decommissioning of nuclear power plants and siting and construction of nuclear waste repositories. With this article, we aim to pr
Publikationen Energie & Klimaschutz Nukleartechnik & Anlagensicherheit Bücher

Analyse der dritten Bundeswaldinventur
So hat der Anteil an naturnahen Baumarten – besonders von Buche und Eiche – genauso

Hier bloggen wöchentlich die Mitarbeiter*innen des Öko-Instituts über Nachhaltigkeitsthemen, aktuelle Projekte und persönliche Sichtweisen.
Wie umweltfreundlich sind Bücher?

A reduction of energy service demand in all sectors is required to reach ambitious climate and other sustainability goals. A growing number of energy and climate scenarios does include detailed assumptions and quantified parameters for the reduction of energy service demand. However, the indicators and units used to measure the demand reduction potential of energy services differ from study to study and are thus difficult to compare. To help fill the existing research gap around the assumptions and quantification of sufficiency potentials, we analyse quantified European-focused sufficiency scenarios that are ambitious with respect to energy demand reduction.
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