3.3.1.2. Renewable energy During the negotiations with the European Union in 2001, Hungary agreed to at least double the 3.6% share of renewable energy within the total energy consumption and to increase the 1% share within electricity consumption to at least 3.6 % by 2010. This percentage which is otherwise the most modest commitment within the entire Community was achieved already in 2005, and, what is more, the share of green energy in the overall energy production was already above 5% in 2005; on the other hand, it was mostly achieved by the incineration of forest wood in low-efficiency power stations which may not mean a long-term solution. According to the Renewable Energy Strategy of Hungary prepared by the government in parallel with the National Climate Change Strategy, the weight of alternative energy production within the overall energy consumption will be at least 16% and that of green energy within electricity consumption will be 18% in 2020. As regards the potential for using renewable energy sources in Hungary, several estimates have been published in recent years although with highly varying conclusions. According to these studies, the annual quantity of energy that can be generated using the current alternative technologies ranges between 150 and 1,300 PJ. However, the estimates show no considerable differences as regards the energy that can be generated using the "theoretically renewable sources: this can amount to up to 2,500 PJ per year. This amount of energy is more than double of the current energy consumption. The studies also agree in attributing the highest potential to biomass in the nearest future, followed by the utilisation of geothermal, wind and solar energy. On the other hand, water energy is also considered as a renewable source; however, in view of the geographical characteristics, and technical and nature conservation aspects, this opportunity could not be considered as a feasible solution in the framework of this Strategy.