But in the United States (U.S.), electric cars in the world’s first mass Nissan Leaf is stated as the most green car (The Top Green Vehicle) and the most efficient in operational costs by 2011. … While the best-selling hybrid car in the world, Toyota Prius is ranked third with an average cost of consumption 50 mpg, or 1 liter per 21.2 km. Although it’s managed to sit at the top, Nissan Leaf population is still very limited in the U.S. only and has been only 453 units …