fuel economy standards

Fuel efficiency remains the top concern among new car buyers around the world, which is likely to boost demand for hybrid and electric vehicles, according to a report from KPMG. But the survey of senior auto-industry executives worldwide also showed that many have serious concerns about such vehicles' affordability.

What are car makers tooting their horns about? All the earth-friendlier engines at the Detroit auto show. Hyundai's plug-in Blue Will concept car and Nissan's all-electric Leaf are just a couple of the new models. Companies are keen to show they are serious about raising gas mileage and reducing emissions.