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Veröffentlichung Technische Ansätze zur Entfernung von Methan aus der Atmosphäre (methane removal)(Umweltbundesamt, 2025)Vor dem Hintergrund der Diskussion über die Entnahme und Speicherung von CO2 (Carbon Dioxide Removal) kommt die Frage auf, ob es auch Technologien gibt, um das 30-fach klimawirksamere Methan (CH4) aus der Atmosphäre zu entfernen (Methane Removal). Methan wird in der Atmosphäre durch natürliche Oxidationsprozesse mit einer mittleren Verweilzeit von 9 bis 12 Jahren in CO2 umgewandelt. In diesem Factsheet wird der Entwicklungsstand von technischen Ansätzen vorgestellt, die diesen Prozess beschleunigen und Methan bei der aktuellen atmosphärischen Konzentration von ca. 2 ppm aus der Atmosphäre entfernen sollen. Die Ansätze sind keine Alternative zu Vermeidung und Reduktion der Methanemissionen.Veröffentlichung Technical approaches to removing methane from the atmosphere (methane removal)(German Environment Agency, 2025)Against the background of the discussion on Carbon Dioxide Removal, the question arises as to whether there are also technologies to remove methane (CH4) from the atmosphere (Methane Removal), which is 30 times more harmful to the climate. Methane is converted into CO2 in the atmosphere by natural oxidation processes with an average residence time of 9 to 12 years. This factsheet presents the development status of technical approaches to accelerate this process and remove methane from the atmosphere at the current atmospheric concentration of approx. 2 ppm. These approaches are not an alternative to avoiding and reducing methane emissions.Veröffentlichung The Research & Funding Landscape of Solar Radiation Modification (SRM)(German Environment Agency, 2024)For many years, research into SRM was only publicly funded to a limited extent. Private funding, mainly from philanthropic institutions, was the main source. More recently, growing interest from both the public and private sectors has been reported, although concrete data on expanded funding streams is limited and the overall scale and direction of this investment remains unclear This factsheet attempts to trace the evolution of Solar Radiation Modification (SRM) project initiatives and their financing. It is based on the project overview table linked below.Veröffentlichung Short typology of carbon dioxide removals(Umweltbundesamt, 2023) Siemons, Anne; Böttcher, Hannes; Liste, Victoria; Öko-Institut; Deutschland. UmweltbundesamtOn 30 November 2022, the Commission proposed a voluntary EU carbon removal certification framework (CRCF) in order to promote carbon dioxide removal (CDR) through natural and technical approaches and spur investments into the respective technologies. This paper analyzes CDR typologies, compares them to CDR in the CRCF and identifies room for improvements. The aim is to stimulate the public debate by highlighting key aspects and implications of CDR activities that should be taken into account in implementing the framework and in future CDR policy-making. Quelle: umweltbundesamt.de