 The government agencies responsible for energy policy are the Ministry of Mines and Energy (MME), the National Council for Energy Policy (CNPE), the National Agency of Petroleum, Natural Gas and Biofuels (ANP) and the National Agency of Electricity (ANEEL).State-owned companies Petrobras and Eletrobras are the major players in Brazil's energy sector, as well as Latin America's.At the end of the 1990s and the beginning of the 2000s, Brazil's energy sector underwent market liberalization.