The following cars represent the most technically advanced available.
The Ford Fusion Energi adds plug-in capabilities to its hybrid drivetrain, giving it 21 miles of pure electric range before the gasoline engine kicks in.
During a presentation of its five-year product plan, a Chrysler spokesman said the company would focus on mild hybrid drivetrains in its vehicles.
The 2014 Lincoln MKZ Hybrid offers a good set of high tech features that ease driving and increase comfort, but the car falls short of the luxury feel of competitors from the likes of Mercedes-Benz and Lexus.
Despite a few minor quibbles, the 2014 Infiniti Q50S Hybrid steps up the tech for good fuel economy, handling, driver-assistance features, and cabin infotainment in a premium sport sedan.
The 2014 Subaru XV Crosstrek Hybrid struggles to justify its bigger price tag, as it doesn't have significant power or efficiency gains over even its non-hybrid base model and pales in comparison to other hybrid wagons.
The 2014 Lexus RX 450h isn't a sexy choice, but it is a strong performer and a comfortable luxury cruiser with one of the quietest power trains in its class.
This footage was shot with a tiny prototype lens being developed at Ohio State University. It combines features of insect eye lenses, such as their wide angle of view, with those of a human eye, such as the ability to shift the focus. Here, the lens focuses on letters positioned at various distances to demonstrate depth of field.
By reducing energy use in its hybrid cars' power control units, Toyota claims it can increase fuel economy by 10 percent.
The 2014 Ford Fiesta EcoBoost gets extraordinary fuel economy, but the skill required to drive it and the limited options available will limit its appeal.
Luxury automaker Bentley will debut a plug-in hybrid concept based on its Mulsanne model at the Beijing auto show later this month.