President Joe Biden will sign an executive order Thursday setting a target for half of all new vehicles sold in the United States to be electric or carbon-free by 2030 as part of a push to reduce the use of gasoline in transportation, the biggest driver of greenhouse gas emissions causing climate change.

The Biden administration will also unveil a proposal to impose stricter standards for fuel-efficiency and tailpipe emissions for cars and light trucks as it seeks to undo a major regulatory rollback of former President Donald Trump.