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The roles digital media-technologies play in raising public issues relating to emerging technologies and their potential for engaging publics with science and policy assessments is a lively field of inquiry in Science and Technology Studies (STS). This paper presents an analysis of controversies over proposals for the large-scale removal of atmospheric carbon dioxide (CDR). The study combines a digital method (web-querying) with document analysis to map debates about two CDR approaches: bioenergy with carbon capture and storage (BECCS) and afforestation. In the first step, we locate actors using the web to engage with BECCS and afforestation and map their alignments in relation to competing framings of CDR. In a second step, we examine the devices deployed by UK-based actors to evidence and contest the feasibility of BECCS and afforestation. Our analysis shows that policy distinctions between "natural" and "engineered" CDR are used flexibly in practice and do not map neatly onto actor engagement with BECCS and afforestation. We highlight the predominance of cross-cutting techno-economic expertise and argue that framings of CDR as a solution to governing climate change may contribute to public disengagement from climate policy processes. The paper reflects on methods for studying controversies, publics, and issues emerging around processes of technoscientific assessment. [ABSTRACT FROM AUTHOR]

Appraisal—defined here to include a variety of ex ante techniques and procedures that seek to predict and evaluate the consequences of certain human actions—has been afforded an increas- ingly important role in environmental policy. We argue in this paper, however, that both the nature of appraisal and its role in the political process have been inadequately conceptualised. Exploring a literature that has tended to polarise ‘technical’ and ‘deliberative’ models, we identify a need for sensitive selection and combination of approaches, taking account of both the object and the objective of appraisal in particular contexts. We suggest that an important role for appraisal (by design or by default) may be that of providing spaces for dialogue and learning in the making of policies and decisions. A better understanding of such processes requires further research, particularly well- designed longitudinal work involving retrospective and ‘real time’ studies of appraisal in practice. [ABSTRACT FROM AUTHOR]

Ahead of November's international conference in Mexico, Andrew Jordan and Tim Rayner report on the re-emergence of climate change in British politics. The UK's major political parties all agree that climate change is man-made and requires urgent action. But will this cross-party consensus endure? Ahead of November's international conference in Mexico, Andrew Jordan and Tim Rayner report on the re-emergence of climate change in British politics. [ABSTRACT FROM AUTHOR]