The Ten-Year Energy Expansion Plan (Plano Decenal de Expansão de Energia, PDE in the Portuguese) is an annual planning document prepared by the Brazil's Energy Research Company (EPE) under the guidance of the Secretariat of Energy Planning and Development (SPE) and the Secretariat of Petroleum, Natural Gas and Biofuel (SPG), both a part of the Ministry of Mines and Energy (MME). It outlines medium-term priorities and investment needs for the energy sector. The latest cycle, PDE 2034, outlines the average share of renewables in the electricity matrix at 86% in 2034. While the plan reinforces the diversification and expansion of renewable energy sources, it also indicates that fossil gas and oil production will continue to expand to meet growing energy demand and ensure energy security. It estimates potential investments of up to BRL 3.2 tn (USD 0.55 tn) over the next decade to expand energy supply, with 78% concentrated in the oil and natural gas industries.