Preston's (2011) challenge to the moral presumption against geoengineering is applied to carbon dioxide capture and storage (CCS) in Scotland, United Kingdom. Qualitative data is analysed to assess if and how Preston's arguments play out in practice. We argue that the concepts of ‘lesser evil’ and prioritising human well-being over non-interference in natural processes do bring different value positions together in support of CCS, but that not all people see short-term carbon abatement as the ‘least worst’ option or a suitable (...) way to prioritise human well-being. (shrink)