You can burn it for home heating or even to produce electricity - but you must make sure that sufficient trees are planted to replace those cut down. Non-renewable sources of energy include coal, oil and natural gas. Look at table . It gives statistics about Brazil's energy sources, renewable and non-renewable. The problem is that to extract the pure gold or iron from their ore, you need very high temperatures.
Brazil lacks good quality coal to produce the temperatures needed.
There were, however, excellent sites for developing hydro-electric power stations as well as petroleum reserves, some offshore below the seabed. The Itaipu hydro-electric power plant is the largest in the world. It took 16 years to build. It needed 15 times more concrete than the Channel Tunnel. The iron and steel used in its construction would build 380 Eiffel Towers.