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Scientists are increasingly convinced that negative emission technologies -- i.e. technologies that can remove carbon dioxide from the atmosphere -- will be necessary at large scale to prevent dangerous climate change. The solutions capable of carbon removal, however, still require significant development before they can be deployed in a cost-effective and sustainable manner. This workshop will explore the different approaches to removing carbon from the atmosphere (including bio-CCS, Direct Air Capture, biochar, and others), and will discuss the political opportunities and challenges presented by these different carbon removal approaches.The workshop will also discuss the overlap between carbon removal technologies and other energy-generation options, and how the two fields could benefit from a shared R&D agenda.