OMB Seeks Public Comment on Social Cost of Carbon

Posted on December 5, 2013 by Carol Dinkins

For the first time, the Office of Management and Budget ("OMB") is soliciting public comment on the Social Cost of Carbon ("SCC").  The SCC is a series of published values that represent the monetary impacts of marginal reductions in carbon emissions reductions, which are to be used by federal agencies when conducting cost-benefit analysis for rulemaking activities. 

First published in 2010, the SCC is prepared by an interagency working group and is based upon three different integrated assessment models that project the economic impacts of climate change.  The 2010 document setting for the SCC called for periodic review and update of the SCC as the science and economic understanding of climate change improves over time. The SCC values were updated in November of 2013 and have been increased to reflect improvements in the underlying integrated assessment models, including incorporation of the projected costs of sea level rise.  Although OMB guidance directs that regulatory cost-benefit analyses should normally focus upon domestic costs and benefits, the SCC is a measure of the global benefits that are projected to result from marginal reductions in GHG emissions.  The interagency working group concluded that the use of a global measure for carbon was appropriate because greenhouse gas emissions create a global externality, and the United States cannot resolve the projected impacts of climate change acting alone.

OMB is seeking public comment on the technical support document that explains how the SCC is set and specifically requests comment on (i) the selection of the integrated assessment models, (ii) how the distribution of SCC estimates should be used in regulatory impact analyses, and (iii) the strengths and limitations of the overall approach.   The SCC is likely to be increasingly important as EPA proceeds with rulemaking activities to regulate greenhouse gas emissions from various sources.  In fact, EPA employs the SCC in the regulatory impact analysis for the currently-pending proposal for New Source Performance Standards for power plants.  The public comment period on the SCC runs through January 27, 2014.

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