Poland currently mines about 65 million Mg of lignite per year, with the main mines being Adamow, Belchatow, Konin, Turow and Sieniawa, working with five lignite-fired power plants. Prospective deposits such as Gubin-Mosty and Legnica-Scinawa could extend lignite mining for the next 50 years, but construction of new mines and power plants requires 15-20 years of preparation. Current energy policy implies the need for modernization and construction of new capacity, as many old units will be shut down, and the decline in output threatens Poland's energy security. The development of the sector depends on political decisions, investments in new deposits and CO2-reducing technologies, with more than 24 billion Mg of lignite estimated in certain reserves, and potential resources reaching 140 billion Mg.