Johannes Emmerling, Massimo Tavoni, 17 April 2013

Implementing comprehensive policies to reduce greenhouse-gas emissions has proved to be difficult. Such sluggishness has increasingly led analysts and researchers to consider geoengineering – the deliberate reduction of the incoming solar radiation – as a viable alternative. Geoengineering used to be seen as somewhat of a ‘last resort’ in terms of climate policy because its implementation would reduce the urgency for current abatement efforts. However, under uncertainty, research suggests that substantial abatement in the short and medium term remains optimal due to the long lead-in time needed for geoengineering projects.

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