The Greening of Chicago: Green Vehicles.

25-miles Southwest of Chicago, at Argonne National Laboratory...research engineers are figuring out what kind of car you'll likely be driving soon. "So that's the future. That' a plug-in hybrid." Argonne's Advanced Powertrain Research Facility is part of the U.S. Department of Energy. One of their big projects right now is this car that's powered by gas and electricity, which is stored in a big battery.