In 2017, materials extracted from domestic natural resources which represents the total amount of materials directly used in the economy, amounted to about 21,4 million tonnes with an decrease of 24.77 % compared to 2016. According to the structure, in 2017, non-metallic minerals account for 49.46 % at the total, followed by biomass with 38.12 %, metal ores with 6.33% and fossil energy materials and carriers with 6.09 %.