Showing papers by "Markus Berger published in 2015"

Abiotic resource depletion in LCA—background and update of the anthropogenic stock extended abiotic depletion potential (AADP) model

Abstract: The depletion of abiotic resources needs to be discussed in the light of available geologic stocks. For the evaluation of long-term resource availability under consideration of the resources’ functional relevance, the abiotic resource stock that is ultimately available for human purposes needs to be identified. This paper discusses the determination of geologic resources stocks and outlines an approach for the estimation of the resource stocks ultimately available for human use in the long-term. Based on these numbers, existing characterization factors for the assessment of resource depletion by means of the anthropogenic stock extended abiotic depletion potential (AADP) model can be updated. For the assessment of long-term resource availability, the share of abiotic resources ultimately available for human extraction needs to be inferred from the quantity of the elements available in the earth’s crust. Based on existing data on crustal concentrations and assumptions regarding the maximal extractable amount of resource, three different approaches for the determination of ultimately extractable reserves are proposed. The different resource numbers are compared, and their effects on the resulting characterization factors derived from the abiotic depletion potential (ADP) and the AADP models are analyzed. A best estimate for the determination of ultimately extractable reserves is proposed. Based on this new resource number, AADP characterization factors for 35 materials are calculated. The use of ultimately extractable reserves leads to an improved applicability of the AADP model and increases the overall significance of the results. Resource security is a premise for sustainable development. The use of resources needs to be evaluated in the context of their decreasing availability for future generations. Thus, resource choices should also be based on an analysis of available resource stocks. The proposed AADP characterization factors based on ultimately extractable reserves will enable a more realistic evaluation of long-term resource availability for human purposes.

Saving the Planet’s Climate or Water Resources? The Trade-Off between Carbon and Water Footprints of European Biofuels

Abstract: Little information regarding the global water footprint of biofuels consumed in Europe is available. Therefore, the ultimate origin of feedstock underlying European biodiesel and bioethanol consumption was investigated and combined with the irrigation requirements of different crops in different countries. A (blue) water consumption of 1.9 m3 in 12 countries per GJ of European biodiesel and 3.3 m3 in 23 countries per GJ of bioethanol was determined. Even though this represents an increase by a factor of 60 and 40 compared to fossil diesel and gasoline, these figures are low compared to global average data. The assessment of local consequences has shown that the irrigation of sunflower seed in Spain causes 50% of the impacts resulting from biodiesel—even though it constitutes only 0.9% of the feedstock. In case of bioethanol production, the irrigation of sugar cane in Egypt, which constitutes only 0.7% of the underlying feedstock, causes 20% of the impacts. In a case study on passenger cars, it was shown that biofuels can reduce the global warming potential by circa 50% along the product life cycle. However, the price of this improvement is an approximate 19 times increased water consumption, and resulting local impacts are even more severe.

Saving the Planet's Climate or Water Resources? The Trade-Off between Carbon and Water Footprints of

Abstract: Little information regarding the global water footprint of biofuels consumed in Europe is available. Therefore, the ultimate origin of feedstock underlying European biodiesel and bioethanol consumption was investigated and combined with the irrigation requirements of different crops in different countries. A (blue) water consumption of 1.9 m 3 in 12 countries per GJ of European biodiesel and 3.3 m 3 in 23 countries per GJ of bioethanol was determined. Even though this represents an increase by a factor of 60 and 40 compared to fossil diesel and gasoline, these figures are low compared to global average data. The assessment of local consequences has shown that the irrigation of sunflower seed in Spain causes 50% of the impacts resulting from biodiesel—even though it constitutes only 0.9% of the feedstock. In case of bioethanol production, the irrigation of sugar cane in Egypt, which constitutes only 0.7% of the underlying feedstock, causes 20% of the impacts. In a case study on passenger cars, it was shown that biofuels can reduce the global warming potential by circa 50% along the product life cycle. However, the price of this improvement is an approximate 19 times increased water consumption, and resulting local impacts are even more severe.

Streamlined Environmental Assessments: Picking the Greenest Option Despite Limited Time and Data at the Federal Environment Agency in Germany

Abstract: The Federal Environment Agency of Germany (Umweltbundesamt: UBA) is expected to provide information regarding the environmental performance of products and technologies — even in cases with limited time and data availability. Therefore, the streamlined environmental assessment (StreamEA) methodology has been developed which combines the competences available throughout the agency. Based on scientific assessment models, a ranking of alternatives can be determined for 15 impact categories, like greenhouse gas (GHG) emissions, nuisance, pathogenic emissions or physical killing of animals. Since the overall environmental burden depends on the specific impact per product and the total number of products, a macroeconomic assessment at the level of the product entirety is included. The applicability of the method, which can be adapted to other regions, and the robustness of results have been tested by means of case studies. The method is currently applied in the daily work of the agency to provide guidance to the general public and policy makers.