The paper aims at demonstrating how the objectives of the energy transition for the year 2050 can be reached without compromising the development of poorer countries as well as without causing a severe recession in developed countries, accepting intermediate technologies in case the final technologies are not yet available or too difficult to be put in place in due time. Furthermore, it is explained the need for a “plan b” in case said objectives are not fully obtained or are not enough to get the planned results.