2010 Opel Flextreme GT-E Concept

Yesterday we covered the new green production cars at the 2010 Geneva Motor Show, now underway in snowy Switzerland. Today, we get to cover the cooler, sexier side of the show: concept cars! So, here's our roundup of notable green and advanced-technology concept cars at Geneva. Audi A1 e-tron concept It seems safe to consider Audi's conversion complete. The company whose U.S. head called buyers of electric cars "idiots" only a year ago has launched the third model in its series of e-tron electric-car concepts at Geneva, all of them headed for low-volume production. Their latest e-Tron is...