BERLIN - MARCH 23:  A gasoline station attendant pumps diesel into a car at a filling station on March 23, 2010 in Berlin, Germany. German President Horst Koehler said on Sunday higher petrol prices is the surest means to convince traditionally car-loving Germans to seek more environmentally-friendly alternatives, and his comment has already sparked the ire of the automobile lobby.  (Photo Illustration by Sean Gallup/Getty Images)