- Open Access
Atmospheric Carbon Dioxide Removal: A Physical Science Perspective
PRX Energy 4, 017001 – Published 27 January, 2025
DOI: https://doi.org/10.1103/PRXEnergy.4.017001
Abstract
Novel carbon dioxide removal (CDR) technologies are increasingly being considered as potentially useful tools to combat climate change. For specific atmospheric carbon dioxide management targets to be achieved, large-scale CDR strategies may be needed, even with aggressive efforts to reduce carbon dioxide emissions in the coming decades. This American Physical Society report breaks down the physical requirements necessary for large-scale implementation of CDR technologies, demonstrating the challenges inherent to incorporating CDR into any carbon dioxide management portfolio. It also provides a technical overview of new and current CDR approaches and evaluates their fundamental physical constraints. Based on the technical overview, the report makes several recommendations for the U.S. federal government and industry. These include ensuring that the potential for CDR does not compromise ongoing actions to reduce carbon emissions. The report observes, however, that while large-scale CDR technologies require a lot of energy and material resources, they might be needed in combination with emission reduction strategies to achieve specific climate goals. Research and development on CDR should be selectively pursued, despite the many challenges described in the report.
Physics Subject Headings (PhySH)
Corrections
7 February, 2025
Correction: Minor typographical errors have been fixed in the Summary box in Sec. V, in the value given for M preceding Eq. (C10), and in the fourth sentence of the penultimate paragraph of the paper.
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This article appears in the following collection:

PRX Energy collection on carbon capture, utilization, and storage
This PRX Energy Collection showcases the latest advances and ideas in carbon capture, utilization, and storage, including modeling, materials- and chemistry-based research, techno-economic analysis, and more. This collection amplifies advancements related to Sustainable Development Goals #7 and #13.
The guest editors for this Collection are Maria Escudero-Escribano of Catalan Institute of Nanoscience and Nanotechnology, Ewa Marek of University of Cambridge, and Jesús Velázquez of University of California-Davis.
Every article in this Collection was subjected to a rigorous peer review process, upholding the high standards applied to all papers. The PRX Energy editorial team managed the peer review and made all editorial decisions.
Popular Summary
More than 15 billion tons of carbon dioxide are released annually due to human activities, contributing to rising atmospheric levels and significant global challenges. While reducing carbon dioxide emissions is crucial, technologies for removing carbon dioxide from the atmosphere are also necessary to mitigate the effects. This policy report explores carbon dioxide removal (CDR) methods, sometimes referred to as negative emission technologies, which reduce the amount of carbon dioxide in the Earth’s atmosphere through sequestration or transformation. Large-scale implementation of CDR systems can complement emissions reduction efforts to help reduce atmospheric levels below thresholds of concern. However, developing and deploying these approaches involve considerable scientific and engineering challenges as well as substantial energy and material resources. This report provides a summary of key CDR approaches, emphasizing fundamental physical constraints and offering science-based policy guidance.
Article Text
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