Critics have warned current fuel - efficiency standards " present a challenge " before the release of the latest targets from National Highway Traffic Safety Administration and US Environmental Protection Agency . John Bozzella , CEO of the trade group Association of American Automakers has urged forthcoming analysis to take into account " consumer preferences and alternative fuels " . Environmentalists argue the standards are " technologically attainable " .
Carmakers have warned current fuel-efficiency standards "present a challenge" before the release of the latest targets from National Highway Traffic Safety Administration and US Environmental Protection Agency. John Bozzella, CEO of the trade group Association of Global Automakers has urged forthcoming analysis to take into account "consumer preferences and alternative technologies". Environmentalists argue the standards are "technologically attainable".