Biden Climate Rules Move Ahead Amid Wait for Final Carbon Metric

The Biden administration is forging ahead with federal regulations using a temporary figure to account for the costs of climate change, as a delay in finalizing a permanent estimate draws frustration from industry and advocates.

The use of estimates to measure the broad costs imposed by carbon dioxide and other greenhouse gases was launched by the Obama administration and revived by President Joe Biden, who set an interim $51 per ton number while the administration finalizes a new metric.

The carbon cost figure is touted as a way to more fully account for the benefits of regulations that cut emissions, ...