CAFE advocates assert most of the gains in fuel economy over the past 30 years can be attributed to the standard itself, and opponents assert economic forces are responsible for fuel economy gains, and higher fuel prices drove customers to seek more fuel-efficient vehicles.
Most of the gains in fuel economy over the past 30 years can be attributed to the standard itself. This is what CAFE advocates assert. Economic forces are responsible for fuel economy gains. This is what opponents assert. Higher fuel prices drove customers. This was to seek more fuel-efficient vehicles.