Seite - 25 - in Our Car as Power Plant

25 But how many cars are there in the world? How many cars do we buy every year? What is the total amount of kilometers we drive per year? What is the capacity of the engines in our cars? And how much time do we use our cars? These statistics will allow us to judge the eff ects of effi ciency improvements and the impact on energy consumption. Worldwide we exceeded the number of 1 billion cars in 2010. By 2012 there are about 298 million commercial vehicles on the road worldwide, and 711 million passenger cars. Over 80 million new cars were produced in 2012: 63 million passenger cars and 21 million commercial vehicles (11,12). The expectation is that the number of vehicles in 2050 will be around 2.5 billion cars (13), according to the OECD Interna- tional Transport Forum. NUMBER OF CARS WORLDWIDE