Dozens of people — including environmentalists, academics and a former general in the U.S. Marines — blasted that plan, citing global warming, jobs, and consumer savings among the reasons. Nearly everyone who offered testimony at the Environmental Protection Agency hearing strongly supported the current standards, which call for a fleet average of about 40 miles per gallon in real-world driving by 2025, up from the mid-20s today. Among the few supporters of the move to pull the standards for a fresh review were two lobbying groups representing major automakers, both foreign and domestic.
The Obama administration had targeted 2025 for CAFE standards of 40 miles per gallon or more. The State of California has its own CAFE standard separate from the U.S. If the U.S. were to reduce the proposed milestone of 40 miles per gallon, it wouldn't prevent individual states from keeping the more stringent requirement.
California sets its own standards, which are followed by 11 other states. Under the Obama administration, California and federal regulations were harmonized, and state officials have said California will hold firm with its tougher standards.