U.S. federal employees should rent electric vehicles and opt for rail trips when feasible on government travel to sharply reduce emissions, the White House said on Thursday. In 2022, U.S. government employees spent $2.8 billion on official travel, taking more than 2.8 million flights, 2.3 million vehicle rentals and 33,000 rail trips. Federal travel accounts for 1.8% of federal greenhouse gas emissions, the White House said.