Garth Heutel, Juan Moreno-Cruz, Katherine Ricke, 04 June 2016

At the the Paris Climate Conference in December 2015, it was agreed that annual global temperature increase must be kept below 2 degrees, and a target of a 1.5 degree annual increase was set. Most environmental policies currently focus on emissions reductions and adaptation. This column discusses a new set of technologies collectively known as climate engineering, and explores their potential effectiveness and role in climate change economics. A lot of uncertainty surrounds the costs and effects of climate engineering tools, but it is clear that they would change the optimal levels of emissions reduction currently discussed in literature.

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