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 " . "The one national program was an aspirational goal, and we don't have it," said Bozzella. Environmentalists argue the standards are " technologically attainable " .
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 " .