WASHINGTON—President Biden made dual moves to reduce greenhouse gas emissions, imposing tougher fuel-efficiency standards on auto makers and challenging them to drastically ramp up sales of electric vehicles by 2030.
Mr. Biden on Thursday signed an executive order setting a target for electric vehicles, hydrogen-fuel cell and plug-in hybrid vehicles to make up 50% of U.S. sales by 2030—a voluntary goal that auto makers said necessitated federal support for vehicle charging stations and consumer tax incentives.
Separately, the Environmental Protection Agency proposed new rules that would require auto makers to achieve a fleetwide average fuel-efficiency equivalent of 52 miles per gallon by the 2026 model year, using an industry measure that takes into account both fuel efficiency and emissions reductions.
The current requirement for that model year is 43.3 miles per gallon under rules set in 2020 by the Trump administration.
Auto makers would be allowed some increased flexibility to use credits they banked in past years by surpassing their goals to comply with the rules, the agency said.