Norway, which already boasts the world's highest number of electric cars per capita, said yesterday that electric or hybrid cars represented half of new registrations in the country so far this year."This is a milestone on Norway's road to an electric car fleet," Climate and Environment Minister Vidar Helgesen told AFP."And it serves to showcase that green transport policies work," he said in an email. Sales of electric cars accounted for 17.6 percent of new vehicle registrations in January and hybrid cars accounted for 33.8 percent, for a combined 51.4 percent, according to figures from the Road Traffic Information Council (OVF). In February, those proportions fell slightly but remained high at 15.8 percent and 32 percent, respectively.Somewhat paradoxically, Norway, the biggest oil producer in Western Europe, has adopted a generous policy to encourage the purchase of cleaner vehicles. While cars with combustion engines are heavily taxed, electric vehicles are exempt from almost all taxes.