ABSTRACT
It has been seen from previous chapters that most emission scenarios that meet the Paris temperature targets make sometimes very extensive use of technologies that involve carbon capture and storage (CCS), some of which also use carbon (CCUS), or which may also, or separately, involve removing carbon dioxide (carbon dioxide removal, or CDR) from the atmosphere. In addition, there is growing interest, given already apparent effects of climate change, in techniques that involve ‘geoengineering’ the climate through direct, large-scale interventions in natural processes in the atmosphere, oceans or on land. This chapter discusses these technologies, their current deployment and possible effectiveness, the use of some of them by companies and, potentially, governments, to ‘offset’ their continuing emissions, and, in respect of geoengineering, how the use of these technologies should be governed and what their potential unintended or negative consequences might be.
