E-mobility is generally regarded as a zero emission. This sentence can only be true in a very small scope, as only in relation to selected parameters and in a very limited its dimension. An example of this is the measurement of CO2 emissions from BEV (battery electric vehicle), which is known to be zero. The situation can change radically if it will be take into account the emissions in the production of electricity that is necessary for the movement of this type of vehicles. This paper presents this problem, taking into account the energy mix in various countries of the European Union. Simulation studies show that there are already countries in the EU in which the operation of electric vehicles makes sense. Especially when it concerns CO2 emissions. Emissions below the standards for 2025 can be obtained there. Unfortunately, in most EU countries, the operation of BEV is associated with an increase (in relation to today) of CO2 emissions. Without the change of energy policy, and in particular the energy mix, the introduction of e-mobility is problematic.