Rebecca Riebe, with Global Midwest Alliance, smiles before departing in a Mitsubishi MiEV, a 100 percent plug-in electric vehicle, during a showcase of cars that run on alternative fuels by the Illinois Chamber of Commerce and Argonne National Laboratory at The Autobahn Country Club Thursday, Aug. 16, 2012, in Joliet. | Matthew Grotto~Sun-Times Media
A Fisker Karma, an all electric sports car, is seen on the track during a showcase of cars that run on alternative fuels by the Illinois Chamber of Commerce and Argonne National Laboratory at The Autobahn Country Club Thursday, Aug. 16, 2012, in Joliet. | Matthew Grotto~Sun-Times Media
Tom Wolf (left), executive director, Energy Council, Illinois Chamber of Commerce, directs people during a showcase of cars that run on alternative fuels by the Illinois Chamber of Commerce and Argonne National Laboratory at The Autobahn Country Club Thursday, Aug. 16, 2012, in Joliet. | Matthew Grotto~Sun-Times Media
Joe Mikulecky (left), with Farnsworth Group, listens as Dave Griebler (right), with Lexus, talks about the RX450h during a showcase of cars that run on alternative fuels by the Illinois Chamber of Commerce and Argonne National Laboratory at The Autobahn Country Club Thursday, Aug. 16, 2012, in Joliet. | Matthew Grotto~Sun-Times Media
Rebecca Riebe (below), with Global Midwest Alliance, climbs in to test drive a Chevrolet Malibu ECO, during a showcase of cars that run on alternative fuels by the Illinois Chamber of Commerce and Argonne National Laboratory at The Autobahn Country Club Thursday, Aug. 16, 2012, in Joliet. | Matthew Grotto~Sun-Times Media
Event manager Jackie Ragain directs vehicles to the track during a showcase of cars that run on alternative fuels by the Illinois Chamber of Commerce and Argonne National Laboratory at The Autobahn Country Club Thursday, Aug. 16, 2012, in Joliet. | Matthew Grotto~Sun-Times Media
JOLIET — It was like the Lollapalooza of alternative-fuel vehicles. There was a Chevy Volt. There were Nissan Leafs. There was a Chrysler Ram pickup running on compressed natural gas. And even a Porsche Cayenne hybrid. And more, more, more. The future of motor vehicles …