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Energie aus Biomasse spielt unter den erneuerbaren Energien eine zunehmend wichtigere Rolle. Biomasse kann industriell weiterverarbeitet werden oder der Erzeugung von Wärme, Strom und anderen Energieformen dienen. Daher ist bereits heute beim Einsatz nachwachsender Rohstoffe eine massive Nutzungskonkurrenz zwischen stofflicher und energetischer Verwertung absehbar.
Aus der begrenzten Verfügbarkeit der Ressource und der steigenden Nachfrage nach Biomasse leitet sich die Forderung nach ihrer möglichst effizienten Verwertung ab. In diesem Zusammenhang fällt immer häufiger der Begriff der Kaskadennutzung von nachwachsenden Rohstoffen (Nawaro) als möglicher Lösungsansatz. Dieses Konzept kann im Wesentlichen als eine Hintereinanderschaltung von (mehrfacher) stofflicher und energetischer Nutzung desselben Rohstoffs gesehen werden und schafft so eine Verbindung des Material- und Energiesektors.
Das Prinzip der Kaskadennutzung ist damit ein Ansatz zur Steigerung der Rohstoffeffizienz von Nawaro und zur Optimierung der Flächennutzung.
Die Ansatzpunkte für Nutzungskaskaden sind vielfältig. Ob und inwieweit derartige Konzepte tragen, wie hoch deren Potenzial ist, welche Voraussetzungen für die Umsetzung zu erfüllen sind, ist aber noch nicht ausreichend untersucht.
Im vorliegenden Diskussionspapier wird zunächst eine Definition des vielfach und teils unterschiedlich verwendeten Begriffs Kaskadennutzung erarbeitet. Die folgenden Darstellungen von Kaskadennutzung integrieren sowohl landwirtschaftliche als auch forstwirtschaftliche Produkte und beziehen sich auf Beispiele der Kaskadennutzung aus beiden Bereichen, um die breite Anwendbarkeit des Konzepts zu verdeutlichen. Zudem werden Anforderungen an eine nachhaltige Kaskadennutzung von Nawaro abgeleitet und Schlussfolgerungen zu deren Ausgestaltung gezogen, damit Unternehmen der Land- und Forstwirtschaft die Potenziale von Nawaro hochwertig und erfolgreich nutzen können.
Vor dem Hintergrund des Klimawandels und der Verknappung fossiler Ressourcen haben nachwachsende Rohstoffe in den letzten Jahren an Bedeutung gewonnen. Insbesondere die Bioenergie hat durch staatliche Fördermaßnahmen viel Aufmerksamkeit erfahren. Mit der Ausweitung der energetischen Nutzung von Biomasse sollen Beiträge zum Klimaschutz durch die Vermeidung von Treibhausgasen geleistet, die Versorgungssicherheit soll durch Ersatz der knapper werdenden fossilen Ressourcen erhöht und der ländliche Raum gestärkt werden. Die selben Argumente lassen sich auch für die stoffliche Nutzung von Biomasse heranziehen. Auch wenn diese etwas aus dem Blickfeld der energiebezogenen Diskussion geraten ist, kann hier in den nächsten Jahren ein erhebliches Marktwachstum erwartet werden. Biomasse als erneuerbare Ressource kann in Land- und Forstwirtschaft aber nur begrenzt bereitgestellt werden. Dies gilt umso mehr, als bestimmte Nachhaltigkeits-Anforderungen eingehalten werden müssen. Der zu erwartenden Nachfragesteigerung für nachwachsende Rohstoffe (Nawaro) steht damit eine limitierte Verfügbarkeit entgegen. Aus dieser leitet sich die Forderung nach einer möglichst effizienten Verwertung ab. In diesem Zusammenhang fällt immer häufiger der Begriff der Kaskadennutzung von Nawaro als möglicher Lösungsansatz. Dieses Konzept kann im Wesentlichen als eine Hintereinanderschaltung von (mehrfacher) stofflicher und energetischer Nutzung desselben Rohstoffs gesehen werden und schafft so eine Verbindung von Material- und Energiesektor. Das Prinzip der Kaskadennutzung ist damit ein Ansatz zur Steigerung der Rohstoffeffizienz von nachwachsenden Rohstoffen und zur Optimierung der Flächennutzung. Das Ziel des vorliegenden Berichts ist es, die Option "Kaskadennutzung" strategisch, differenziert und ganzheitlich zu beleuchten. Im Rahmen der Projektarbeit sind daher Anforderungen an eine nachhaltige Kaskadennutzung von Nawaro abgeleitet und Schlussfolgerungen zu deren Ausgestaltung gezogen worden, um die Potenziale von Biomasse hochwertig und erfolgreich zu nutzen.
The optimization of value chains is an important process to promote sustainable development, since value chains are closely linked to the satisfaction of human needs and combine different driving forces for environmental change. This article presents a methodological approach for the participatory development of value-chain wide sustainability indicator sets and their integration into a decision support tool in the specific case study of the chain "construction and refurbishment with wood". There are numerous indicator sets for sustainable development of forests and sustainable forestry available at different levels, ranging from local, regional and national to global scale assessments. Some efforts were also made to integrate later production stages of forest value chains (such as wood processing) in the assessment scope (e.g. for chain-of-custody certification). However, no indicator set has so far been available covering environmental, social and economic aspects for the entire value chain of building with timber. This gap was closed through applied sustainability research in the project "Holzwende 2020: Sustainable future markets for wood in the building sector".
The food and agricultural sector will face numerous challenges in the next decades, arising from changing global production and consumption patterns, which currently go along with high resource use, causing ecological and socio-economic impacts. The aim of this paper is to illustrate and evaluate the practical applicability of the Hot Spot Analysis methodology in the context of supply chain management in companies. The HSA is a method to identify social and ecological problems along the entire life cycle of a product. Special emphasis is put on a customized implementation in the value chain beef of McDonald's Germany. The HSA of McDonald's beef value chain shows that the main ecological problems arise in the phase of raw material extraction, whereas the main social problems can be identified in the phase of slaughtering. Finally, the paper shows potentials and shortcomings of such a customized application and how the results can be implemented in the sustainability management of a company.
Despite rising prices for natural resources during the past 30 years, global consumption of natural resources is still growing. This leads to ecological, economical and social problems. So far, however, limited effort has been made to decrease the natural resource use of goods and services. While resource efficiency is already on the political agenda (EU and national resource strategies), there are still substantial knowledge gaps on the effectiveness of resource efficiency improvement strategies in different fields. In this context and within the project "Material Efficiency and Resource Conservation", the natural resource use of 22 technologies, products and strategies was calculated and their resource efficiency potential analysed. In a preliminary literature- and expert-based identification process, over 250 technologies, strategies, and products, which are regarded as resource efficient, were identified. Out of these, 22 subjects with high resource efficiency potential were selected. They cover a wide range of relevant technologies, products and strategies, such as energy supply and storage, Green IT, transportation, foodstuffs, agricultural engineering, design strategies, lightweight construction, as well as the concept "Using Instead of Owning". To assess the life-cycle-wide resource use of the selected subjects, the material footprint has been applied as a reliable indicator. In addition, sustainability criteria on a qualitative basis were considered. The results presented in this paper show significant resource efficiency potential for many technologies, products and strategies.
The concept Material Input per Service Unit (MIPS) was developed 20 years ago as a measure for the overall natural resource use of products and services. The material intensity analysis is used to calculate the material footprint of any economic activities in production and consumption. Environmental assessment has developed extensive databases for life cycle inventories, which can additionally be adopted for material intensity analysis. Based on practical experience in measuring material footprints on the micro level, this paper presents the current state of research and methodology development: it shows the international discussions on the importance of accounting methodologies to measure progress in resource efficiency. The MIPS approach is presented and its micro level application for assessing value chains, supporting business management, and operationalizing sustainability strategies is discussed. Linkages to output-oriented Life Cycle Assessment as well as to Material Flow Analysis (MFA) at the macro level are pointed out. Finally we come to the conclusion that the MIPS approach provides relevant knowledge on resource and energy input at the micro level for fact-based decision-making in science, policy, business, and consumption.
Das Deutsche Zentrum für Luft- und Raumfahrt (DLR) hat gemeinsam mit dem Wuppertal Institut für Klima, Umwelt, Energie in der Studie "STROMbegleitung" Technologien, Perspektiven und Ökobilanzen elektrifizierter PKW untersucht. Die Studie gibt einen umfassenden Einblick in den aktuellen Stand der Technik, identifiziert Trends und analysiert die Ökobilanz unterschiedlicher Fahrzeugkonzepte. Gleichzeitig ordnet sie die deutschen Aktivitäten im Bereich Elektromobilität in einen globalen Kontext ein.
The CO2 utilisation is discussed as one of the future low-carbon technologies in order to accomplish a full decarbonisation in the energy intensive industry. CO2 is separated from the flue gas stream of power plants or industrial plants and is prepared for further processing as raw material. CO2 containing gas streams from industrial processes exhibit a higher concentration of CO2 than flue gases from power plants; consequentially, industrial CO2 sources are used as raw material for the chemical industry and for the synthesis of fuel on the output side. Additionally, fossil resources can be replaced by substitutes of reused CO2 on the input side. If set up in a right way, this step into a CO2-based circular flow economy could make a contribution to the decarbonisation of the industrial sector and according to the adjusted potential, even rudimentarily to the energy sector.
In this study, the authors analyse potential CO2 sources, the potential demand and the range of applications of CO2. In the last chapter of the final report, they give recommendations for research, development, politics and economics for an appropriate future designing of CO2 utilisation options based upon their previous analysis.
Innerhalb des Projektes NsB-Ress untersuchten Forscherinnen und Forscher eine Konsumform hinsichtlich seiner Ressourceneffizienz- und Diffusionspotenziale, die eine ressourcenschonendere und -effizientere Nutzung natürlicher Ressourcen verspricht. Das Credo: nutzen statt besitzen. Zum Zweck dieser Untersuchung machten sie eine Bestandsaufnahme der aktuell und zukünftig marktrelevanten NsB-Angebote, deren Ressourceneinsparpotenziale im Nachgang analysiert wurden. Durch diese Schritte sollen Erkenntnisse und Aussagen über den möglichen Ressourcenverbrauch und Reboundeffekte möglich werden. Weiterhin wurden Erfolgsfaktoren für die Diffusion von Angeboten identifiziert sowie Einsparpotenziale erschlossen, um auszuloten, wie NsB-Angebote frühzeitig ressourcenleicht gestaltet werden können. Am Ende des Projektes sollen Handlungsempfehlungen für relevante Akteure - also Politik, Wirtschaft sowie Verbraucherinnen und Verbraucher - generiert werden.
Das Projektteam zeichnet in der vorliegenden Broschüre ein differenziertes Bild, das sowohl ökologisch als auch sozial wünschenswerte und förderungswürdige NsB-Angebote aufzeigt, aber auch diejenigen benennt, die mit Reboundeffekten verbunden sein können und deshalb einer politischen Rahmensetzung bedürfen.
Since human nutrition is responsible for about 30 % of the global natural resource use and in order to decrease resource use to a level in line with planetary boundaries, Lukas et al. (2016) proposed a re-source use reduction in the nutrition sector by a factor 2 (Material Footprint).
The catering sector needs clearly defined indicators to assess their business activities' impact on ecology, social aspects, economic value, and health status. Within the project NAHGAST two sets of indicators, called NAHGAST Meal-Basis and NAHGAST Meal-Pro were developed. The indicator sets are proposed to measure several, with sustainability-associated challenges, such as such as the ecological, social and economical effects, which may come along with the production and the consumption of a meal. Basically, the NAHGAST Meal-Basis deals with qualitative indicators, such as the amount of organic food per serving or the percentage of food wasted. This set is supposed to enable leaders to assess the sustainability of their meals and to visualize future improvements on a simplistic level. The NAHGAST Meal-Pro deals with a more sophisticated set of indicators, such as the carbon and material footprint or the cost recovery per meal. Both sets are underpinned with sus-tainable targets and elaborated as an Excel-based assessment tool, which is tested within a one-year case study. The usefulness and the limits of the tool, as well as current results of the implementation including pro-posed challenges, are discussed.
Das Forschungsprojekt untersucht, ob und wie die stoffliche Nutzung von Biomasse in Kaskaden zur Steigerung der Ressourceneffizienz beitragen kann. Es entwickelt eine klare Definition des Begriffs der Kaskadennutzung und analysiert existierende Konzepte der Kaskadennutzung. Als relevante Felder der Kaskadennutzung werden der Holzsektor, der Papiersektor, der Textilsektor und der Kunststoffsektor identifiziert und Ökobilanzen jeweils in diesen vier Sektoren durchgeführt. Die Ergebnisse zeigen deutliche Umweltvorteile für die Mehrzahl der untersuchten Kaskadenoptionen, es bedarf jedoch der Einzelfallbetrachtung. Ein Bewertungskonzept zur ersten Einschätzung möglicher Kaskadenansätze für Anwender wird entwickelt. Das Projekt empfiehlt, die Kaskadennutzung von Biomasse als "Prinzip" unterstützend in übergreifende Politikziele und Strategien einzubinden.
We present the results of a regression analysis of a large-scale integrated user online application that surveys natural resource use and subjective well-being in Germany. We analyse more than 44,000 users who provided information on their natural resource consumption (material footprint) as well as their personal socio-economic and socio-psychological characteristics. We determine an average material footprint of 26 tonnes per person per year. In addition, we endeavour to determine how much environment humans need by regressing natural resource use as well as relevant socio-economic and socio-psychological features on subjective well-being. We establish a slightly negative correlation between subjective well-being and material footprints. A higher material footprint is associated with lower subjective well-being. We conclude that consumer policies seeking to promote sustainable behaviour should highlight the fact that a lower material footprint may result in greater subjective well-being.
Die Umweltauswirkungen von Teil-, Miet- oder Tauschangeboten aus dem Bereich der Sharing Economy werden zumeist aus einer Nachhaltigkeitsperspektive betrachtet und dementsprechend mit einer Verminderung des Ressourcenverbrauchs sowie einer gesteigerten Ressourceneffizienz verbunden. Handelt es sich bei Sharing Economy tatsächlich um eine ressourcenschonende, energieeffiziente und für den "Massenmarkt" geeignete Konsumalternative oder haben wir es vielmehr mit einer kurzzeitigen Nischeninnovation einzelner Lifestyle-Communities zu tun?
Nutrition is responsible for about 30% of global natural resource use. In order to limit the negative impact the nutritional sector has on the environment and on society, the consumption and processing of foodstuffs with assumed low negative impact is an important topic in the effort of sustainable development. In professional kitchens, clearly defined indicators assessing the impact of business activities are needed in this effort. The research and development in the NAHGAST project provides groundwork that could be of important assistance in this effort. Two versions of an assessment tool, with indicators of different complexity (NAHGAST Meal-Basic and NAHGAST Meal-Pro), were developed that can be used by kitchen professionals to determine the sustainability performance of their products - the offered meal. An informed selection of indicators, and a discussion of what processes and impacts this indicator relates to in the wider context, are essential and are discussed in this paper. Furthermore, in the selection of indicators for the purpose of our research certain criteria were considered simultaneously: (1) Communicability - What information an indicator can communicate and how comprehensible this information is for different actors; (2) Feasibility and data availability - Whether there is sufficient data for an indicator to be included and whether it is realistic for companies to integrate this indicator in their daily work practice; and (3) Scientific relevance - Whether the indicator is relevant for sustainability efforts on a larger scale and for related discussions in the scientific community. Insights related to these considerations are valuable for future developments in sustainability assessment in out-of-home gastronomy. The tool has been used to evaluate a number of dishes and results are deemed meaningful. However, assessments must not be understood as an accurate measurement but as an approximation of the sustainability of meals. At the level of individual indicators, they allow a detailed analysis and targeted optimization of recipes, while the aggregated results in the form of labels can be communicated well to customers. However, deficiencies and challenges, as discovered in the application phase of the project, demonstrate research gaps in the wider context. Finally, further steps for an integration of the tool in company processes and remaining options for companies to adjust the tool are discussed.
Combined heat and power (CHP) production in buildings is one of the mitigation options available for achieving a considerable decrease in GHG emissions. Micro-CHP (mCHP) fuel cells are capable of cogenerating electricity and heat very efficiently on a decentralised basis. Although they offer clear environmental benefits and have the potential to create a systemic change in energy provision, the diffusion of mCHP fuel cells is rather slow. There are numerous potential drivers for the successful diffusion of fuel cell cogeneration units, but key economic actors are often unaware of them. This paper presents the results of a comprehensive analysis of barriers, drivers and business opportunities surrounding micro-CHP fuel-cell units (up to 5 kWel) in the German building market. Business opportunities have been identified based not only on quantitative data for drivers and barriers, but also on discussions with relevant stakeholders such as housing associations, which are key institutional demand-side actors. These business opportunities include fuel cell contracting as well as the development of a large lighthouse project to demonstrate the climate-neutral, efficient use of fuel cells in the residential building sector. The next step could involve the examination and development of more detailed options and business models. The approach and methods used in the survey may be applied on a larger scale and in other sectors.
Measure or management? : Resource use indicators for policymakers based on microdata by households
(2018)
Sustainable Development Goal 12 (SDG 12) requires sustainable production and consumption. One indicator named in the SDG for resource use is the (national) material footprint. A method and disaggregated data basis that differentiates the material footprint for production and consumption according to, e.g., sectors, fields of consumption as well as socioeconomic criteria does not yet exist. We present two methods and its results for analyzing resource the consumption of private households based on microdata: (1) an indicator based on representative expenditure data in Germany and (2) an indicator based on survey data from a web tool. By these means, we aim to contribute to monitoring the Sustainable Development Goals, especially the sustainable management and efficient use of natural resources. Indicators based on microdata ensure that indicators can be disaggregated by socioeconomic characteristics like age, sex, income, or geographic location. Results from both methods show a right-skewed distribution of the Material Footprint in Germany and, for instance, an increasing Material Footprint with increasing household income. The methods enable researchers and policymakers to evaluate trends in resource use and to differentiate between lifestyles and along socioeconomic characteristics. This, in turn, would allow us to tailor sustainable consumption policies to household needs and restrictions.
Die Modellierungs-Studie "Reparaturkosten-Empfehlung" wurde vom Wuppertal Institut im Auftrag der Verbraucherzentrale Nordrhein-Westfalen erstellt. Die Studie zielt auf die Berechnung von maximalen Reparaturkosten, die für eine Reparatur aus finanzieller Sicht sinnvoll für Verbraucherinnen und Verbraucher sind. Zusätzlich wird die ökologische Vorteilhaftigkeit von Reparaturen beispielhaft diskutiert.
Green Information Systems in general, and footprint calculators in particular, are promising feedback tools to assist people in adopting sustainable behaviour. Therefore, a Material Footprint model for use in an online footprint calculator was developed by identifying the most important predictors of the Material Footprint of the calculator's users. By means of statistical learning, the analysis revealed that 22 of the 95 predictors identified accounted for 74% of the variance in Material Footprints. Ten predictors out of the 95, mainly from the mobility domain, were capable of showing a prediction accuracy of 61%. The authors conclude that 22 predictors from the areas of mobility, housing and nutrition, as well as sociodemographic information, accurately predict a person's Material Footprint. The short and concise Material Footprint model may help developers and researchers to enhance their information systems with additional items while ensuring the data quality of such applications.
Footprint calculators are efficient tools to monitor the environmental impact of private consumption. We present the results of an analysis of data entered into an online Material Footprint calculator undertaken to identify the socioeconomic drivers of the Material Footprint in different areas of consumption, from housing to holidaymaking. We developed regression models to reveal (1) the impact of socioeconomic characteristics on Material Footprints of private households and (2) correlations between the components of Material Footprints for different arrays of consumption. Our results show that an increasing Material Footprint in one array of consumption comes with an increasing Material Footprint in all other arrays, with the exception of housing and holidaymaking. The socioeconomic characteristics of users have a significant impact on their Material Footprints. However, this impact varies by the array of consumption. Households only exhibit generally bigger Material Footprints as a result of higher incomes and larger dwellings. We conclude that indicators which strive to monitor resource efficiency should survey disaggregated data in order to classify the resource use to different population groups and arrays of consumption.
The Wuppertal Institute conducted an impact analysis of the NRW Sustainability Bond #4 of 2018 on behalf of the State Government of North Rhine-Westphalia (NRW). The most recent bond has a volume of EUR 2.025bn, a term of 10 years and consists of 52 eligible projects from the State's 2017 general budget (sustainable value-added was confirmed in a second party opinion by oekom research1). This report analyses the contribution of the bond to climate mitigation, sustainable land use and social impacts. It also includes information on the impacts of the previous three bonds (NRW Sustainability Bond #1 to #3).
Die Wirtschaftsleistung von Deutschland ist durch die Corona-Pandemie stark beeinträchtigt. Um die Wirtschaft zu beleben, einigten sich die Regierungsparteien am 3. Juni 2020 in ihrem Koalitionsausschuss auf ein "Konjunktur- und Krisenbewältigungspaket" sowie ein "Zukunftspaket" in Höhe von insgesamt 130 Milliarden Euro. Für 2020 und 2021 sind fast 60 Maßnahmen vorgesehen, die von steuerlichen Vergünstigungen bei der Mehrwertsteuer bis hin zu konkreten Investitionen in Zukunftstechnologien reichen. Mit Blick auf den Klimaschutz beinhaltet das Maßnahmenpaket der Großen Koalition zwar gute Ansätze und viele wichtige Impulse, die allerdings zu verpuffen drohen, wenn sie nicht durch eine konsequente und nachhaltig ausgerichtete Klimapolitik flankiert werden. Zudem fehlen für den Klimaschutz wichtige Bereiche, wie Investitionen in die Kreislaufwirtschaft. Außerdem werden Maßnahmen zur Steigerung der Energieeffizienz nur unzureichend berücksichtigt. Gerade in diesen Bereichen hätten sich konjunkturbelebende Effekte und Klimaschutz in idealer Form ergänzen können, kritisiert das Wuppertal Institut. Dieses Diskussionspapier reagiert auf die vorliegenden Vorschläge und fasst zusammen, welche Maßnahmen im Rahmen der jetzt anstehenden Umsetzungsphase nachgebessert werden sollten und wo Ergänzungen notwendig sind.
Every diet has an impact on an individual’s health status, the environment, as well as on social concerns. A growing number of meals are consumed in the out-of-home catering sector, in which a systematic sustainability assessment is not part of common practice. In order to close this gap, an instrument was developed as part of the NAHGAST project. After more than one year of using the NAHGAST online tool, it needs to be assessed what positive environmental influences can be realized by using the tool. For this reason, this article deals with the question of whether an online tool can enable stakeholders from the out-of-home consumption sector to revise their meals with regard to aspects of a sustainable diet. In addition, it will be answered how precise recipe revisions of the most popular lunchtime meals influence the material footprint as well as the carbon footprint. In conclusion, an online tool can illustrate individual sustainability paths for stakeholders in the out-of-home consumption sector and enables an independent recipe revision for already existing meals. The results show that even slight changes in recipes could lead to savings of up to a third in carbon footprint as well as in material footprint. In relation to the out-of-home consumption sector, this results in the potential for substantial multiplication effects that will pave the way for the dissemination of sustainable nutrition.
Gesund, umweltfreundlich und sozialverträglich : wie ein Onlinetool hilft, nachhaltiger zu kochen
(2020)
Jede Kostform hat Auswirkungen auf den individuellen Gesundheitsstatus, die Umwelt und soziale Aspekte. Insbesondere ökologische und soziale Belange werden im Alltag der Außer-Haus-Verpflegung in der Regel nur vage abgeschätzt, eine systematische Nachhaltigkeitsbewertung von Speisen findet zumeist nicht statt. Seit Mai 2018 unterstützt der hier vorgestellte Menü-Rechner Akteure in unterschiedlichen Verpflegungseinrichtungen bei der Nachhaltigkeitsbewertung. Das Instrument wurde im Rahmen des NAHGAST-Projektes (www.nahgast.de) in Kooperation mit fünf Praxispartnern entwickelt und durch insgesamt 120 Rezepturen getestet und validiert. Der vorliegende Artikel gibt einen Überblick über Nachhaltigkeitsbewertungen ausgewählter Rezepturen (Gerichte mit Fisch und Fleisch, sowie vegetarische und vegane Gerichte) und stellt heraus, welche Effekte sich für die ökologische, gesundheitliche und soziale Dimension zeigen.
Every diet has an impact on an individual's health status, the environment as well as on social aspects. In particular, ecological and social concerns are usually only vaguely assessed in the daily routines of out-of-home catering and a systematic sustainability assessment of meals is usually not carried out. Since May 2018, the menu calculator presented in this paper has been supporting stakeholders in various catering establishments with their sustainability assessment. The tool was developed within the NAHGAST project (www.nahgast.de) in cooperation with five practice partners and tested and validated by a total of 120 recipes. This article provides an overview of selected recipes' sustainability assessments (meals with fish and meat as well as vegetarian and vegan meals) and highlights the effects on the ecological, health and social dimensions.
Recent research on the natural resource use of private consumption suggests a sustainable Material Footprint of 8 tons per capita by 2050 in industrialised countries. We analyse the Material Footprint in Germany from 2015 to 2020 in order to test whether the Material Footprint decreases accordingly. We studied the Material Footprint of 113,559 users of an online footprint calculator and predicted the Material Footprint by seasonally decomposed autoregressive (STL-ARIMA) and exponential smoothing (STL-ETS) algorithms. We find a relatively stable Material Footprint for private consumption. The overall Material Footprint decreased by 0.4% per year between 2015 and 2020 on average. The predictions do not suggest that the Material Footprint of private consumption follows the reduction path of 3.3% per year that will lead to the sustainable consumption of natural resource
The demand for metals from the entire periodic table is currently increasing due to the ongoing digitalization. However, their use within electrical and electronic equipment (EEE) poses problems as they cannot be recovered sufficiently in the end-of-life (EoL) phase. In this paper, we address the unleashed dissipation of metals caused by the design of EEE for which no globally established recycling technology exists. We describe the European Union's (EU) plan to strive for a circular economy (CE) as a political response to tackle this challenge. However, there is a lack of feedback from a design perspective. It is still unknown what the implications for products would be if politics were to take the path of a CE at the level of metals. To provide clarification in this respect, a case study for indium is presented and linked to its corresponding recycling-metallurgy of zinc and lead. As a result, a first material-specific rule on the design of so-called "anti-dissipative" products is derived, which actually supports designing EEE with recycling in mind and represents an already achieved CE on the material level. In addition, the design of electrotechnical standardization is being introduced. As a promising tool, it addresses the multi-dimensional problems of recovering metals from urban ores and assists in the challenge of enhancing recycling rates. Extending the focus to other recycling-metallurgy besides zinc and lead in further research would enable the scope for material-specific rules to be widened.
Agriculture is an economic sector with massive impact on biodiversity and agrobiodiversity. Sustainable diets represent a critical policy leverage and a realistic opportunity to reduce the environmental impact of the agro-food sector while improving human health at the same time. Eating out is an increasingly common habit for many consumers and, by offering sustainable dishes, catering companies can play a central role. To do this, they need to understand and correctly assess the sustainability of their food portfolio, but assessment tools are not well established yet. The NAHGAST project, of which this study was part, developed and tested a sustainability assessment tool for catering companies based on concrete targets defined per meal. This study addresses the lack of methods to evaluate the impact of food on biodiversity, with a particular focus on agrobiodiversity. The work illustrates a context-specific application of an enhanced DPSIR model to structure information and select indicators, and proposes a transdisciplinary use of existing metrics. Further research is needed in order to define scientifically sound target values or sustainability ranges for each indicator per meal, in order to calculate them. Strengths and limits of the study are discussed.
Cross-country evidence on the adoption of energy-efficient retrofit measures (EERMs) in residential buildings is critical to supporting the development of national and pan-European policies aimed at fostering the energy performance upgrade of the building stock. In this light, the aim of this paper is to advance in the understanding of the probability of certain EERMs taking place in eight EU countries, according to a set of parameters, such as building typology, project types, and motivation behind the project. Using these parameters collected via a multi-country online survey, a set of discrete-choice (conditional logit) models are estimated on the probability of selecting a choice of any combination of 33 EERMs across the sampled countries. Results show that actions related to the building envelope are the most often-addressed across countries and single building elements or technology measures have a higher probability of being implemented. The modelling framework developed in this study contributes to the scientific community in three ways: (1) establishing an empirical relationship among EERMs and project (i.e., retrofit and deep retrofit), (2) identifying commonalities and differences across the selected countries, and (3) quantifying the probabilities and market shares of various EERMs.
The data centre industry (DCI) has grown from zero in the 1980s, to enabling 60% of the global population to be connected in 2021 via 7.2 million data centres. The DCI is based on a linear economy and there is an urgent need to transform to a Circular Economy to establish a secure supply chain and ensure an economically stable and uninterrupted service, which is particularly difficult in an industry that is comprised of ten insular subsectors. This paper describes the CEDaCI project which was established to address the challenge in this unique sector; this ground-breaking project employs a whole systems approach, Design Thinking and the Double Diamond methods, which rely on people/stakeholder engagement throughout. The paper reviews and assesses the impact of these methods and project to date, using quantitative and qualitative research, via an online sectoral survey and interviews with nine data centre and IT industry experts. The results show that the project is creating positive impact and initiating change across the sector and that the innovative output (designs, business models, and a digital tool) will ensure that sectoral transformation continues; the project methods and structure will also serve as an exemplar for other sectors.