Pau experienced an important economic boom based on the discovery of the giant deposit of natural gas in Lacq. Discovered in the 1950s (by engineer Jean Féger), it was then the largest terrestrial deposit of gas in Europe and helped France to be self-sufficient in gas for almost thirty years. The "Société Nationale des Pétroles d'Aquitaine" (SNPA) was born at Lacq in 1941, after merger with ELF in 1976 it became part of the Elf Aquitaine group, then Total during its integration into the Group TotalFinaElf (in Lacq, known now the SNEAP, Société Nationale Elf Aquitaine Production). Oil and focussed businesses (Total Exploration Production France, Total SA, Total infrastructure Gaz France (TIGF), Schlumberger, Halliburton) and chemical (Arkema, Air Liquide) settled in Pau or the surrounding area (in Lacq at the Chemparc chemical park but also in Pardies and Artix).