Various logos on eco-friendly cars are seen on the first media day of the 78th Geneva Car Show at the Palexpo in Geneva in this March 4, 2008 combination photograph. (From top to bottom) The logos belong to (first column) Saab BioPower, Toyota Prius, GM Hydrogen4 concept car (twice), E'mobile Volvo V50 and Rinspeed sQuba; and (second column) Mitsubishi iEV, Cadillac Escalade, Volkswagen GTI, Renault Eco2 logo and Gasmobil Mercedes-Benz E200 NGT. REUTERS/Denis Balibouse (SWITZERLAND)