A US appeals court upheld a rule from President Joe Biden's administration that set the amount of biofuels that oil refiners were required to blend into the nation's fuel mix from 2020 through 2022. The decision rejected challenges from oil refiners who argued that the mandates were too stringent. The ruling also dismissed claims from renewable fuel producers that the standards were too low. This ruling supports the EPA's renewable-fuel standards for the specified years. The decision was made by a divided D.C. Circuit panel.