Biden’s Win on Carbon Costs Temporarily Dodges Rulemaking Bullet

A Supreme Court decision reviving a key interim carbon metric provides some relief from uncertainty while the Biden administration moves forward with new climate rules—but lower court hurdles still lie ahead, according to legal experts.

Justices on Thursday, without explanation or dissent, moved to restore the administration’s use of a social cost of carbon figure within rulemaking cost-benefit analyses. The decision scraps Republican states’ bid to halt the estimate’s use, while broader litigation moves forward in other courts.

“The Supreme Court’s decision today not to reinstate an injunction on the use of that science—an injunction that was the result of ...