The ACEA Position Paper welcomes the COP21 climate change conference as an opportunity to establish a policy framework for reducing CO2 emissions in Europe. The paper notes that average new car CO2 emissions have decreased by 33.7% since two decades ago, and that by 2021, CO2 emissions from new cars will be almost 42% lower than in 2005. The paper calls for policy makers to ensure that the COP21 climate talks result in equivalent conditions for all major emitting economies and industrial sectors around the world, and that the outcome of the negotiations forms the basis of a new long-term and predictable policy framework. The paper also emphasizes the importance of achieving the greatest effects at the lowest costs, while keeping mobility affordable, and suggests that a comprehensive approach to reducing CO2 emissions will be the most effective way to accelerate the decarbonization of transport.