Over the last years, the increased sensitivity in environmental issues leads to the development of energy policies to reduce CO2 emissions. The most polluting sector is electricity generation. For this reason, Life Cycle Assessment has been chosen as tool to evaluate the variation in the production of kg of CO2 per kWh of electricity produced until 2030. In this work particularly, two target countries were chosen, Germany and Spain due to their willingness to participate in the energy transition objective. The scenarios of electricity production are based on the National Energy Plan of each country. Each of these plans indicates the energy policies for the implementation of renewable energy sources, and also coal and nuclear power plants decommissioning.