Associated Press: Americans continue to worry about their energy use even though filling up at the gas pump isn’t the budget-busting experience it was a year ago, a new survey shows. The Consumer Federation of America survey, which was released Tuesday, said that motorists still want more fuel-efficient cars despite gas prices that have been halved. Gas prices spiked to more than $4 a gallon in some cities last summer, forcing many commuters to leave their cars in the driveway, join car pools or take …