Extraction of energy resources; mineral resources

• Briquette, charcoal (6)
• Collection, purification and distribution of water (69)
• Extraction and agglomeration of peat (9)
• Extraction of crude petroleum and natural gas (5)
• Extraction of slate (7)
• Manufacture of coke oven products (9)
• Manufacture of gas; distribution of gaseous fuels through mains (9)
• Manufacture of refined petroleum products (9)
• Mining and agglomeration of hard coal (14)
• Mining and agglomeration of lignite (5)
• Mining of clays and kaolin (9)
• Operation of gravel and sand pits (16)
• Other mining and quarrying (1)
• Production and distribution of electricity (69)
• Production of aggregates (35)
• Production of salt (11)
• Quarrying of limestone, gypsum and chalk (10)
• Quarrying of stone (23)
• Steam and hot water production, supply and distribution (92)
• Wholesale of solid, liquid and gaseous fuels and related products (80)
• Wholesale trade of energetic resources (15)