Geoengineering is deliberate intervention in the climate system to counteract man-made global warming. There are two main classes of geoengineering; direct carbon dioxide removal, and solar radiation management, which aims to cool the planet by reflecting more sunlight out to space. This talk will summarise the findings of a recent review of Geoengineering carried-out by the UK Royal Society (see http://royalsociety.org/document.asp?tip=1&id=8770 ), discussing the climate effects, costs, risks, and research and governance needs for each approach.
Key findings include
- Geoengineering is not a magic bullet and not an alternative to emissions reductions.
- Cutting global greenhouse gas emissions must remain our highest priority –
- But this is proving to be difficult, and Geoengineering may be useful to support it
- Geoengineering is very likely to be technically possible
- However, there are major uncertainties and potential risks concerning effectiveness, costs and social & environmental impacts
- Much more research is needed, as well public engagement and a system of regulation (for both deployment and for possible large-scale field tests)
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