President Trump announced earlier this week that he intends to take actions to increase the mandate to add ethanol to fuels. Currently, refineries producing transportation fuel must demonstrate each year that they have blended certain volumes of renewable fuel into gasoline or diesel, or else acquire expensive credits from others who do so.

The Trump administration’s action, which would require formal rulemaking, would direct the EPA to allow gasoline with 15 percent ethanol to be distributed year-round, reversing the current ban during summer months.