European Parliament sanctioned some changes in the European Regulations nº 510/2011, on the 11th of May, 2011. Modifications include rules in the emission behavior that concern to light commercial vehicles. This approach is integrated in a part of the European framework and the goal is to reduce CO2 emissions. The objective is to get 147 g of CO2 in 2020 for emissions in light vehicles. There is an exemption in small producers. Greenhouse effect gas emissions are related to energy supply and production and deleting vehicles. They are the biggest emissions producers. In the future, we should take care about them more carefully. Therefore now, we should do actions that producer can guide their behavior looking for the optimal solution that contain measure that control greenhouse gas emissions in the energy production when they take a car, and also with electricity and alternative fuels. They should guarantee that benefits of energy saving are conserved.