EPA and other federal agencies use the social cost of carbon (SCC) to estimate the climate benefits of rulemakings.
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The Obama administration says it will not reconsider a new carbon emissions formula for federal regulations.

The conservative group Landmark Legal Foundation filed a petition in August calling on the Department of Energy (DOE) to strike the provision on the “social cost of carbon” from a microwave efficiency rule.

The DOE denied the petition and said the input on the social cost of carbon provision “did not influence [its] decision regarding the final energy conservation standard chosen.”

Reconsidering the rule would not change the standard adopted for microwave ovens, the department said in an early copy of its response that will be published Tuesday.

The social cost of carbon directive, which was updated in June by the Office of Management and Budget, bumped the cost of carbon to $35 per metric ton from $21.