1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km2 (0.386 sq mi or 247 acres) and river estuaries.2 Population without double counting: residents of multiple communes (e.g., students and military personnel) only counted once.
It lies just northwest of the local capital of Pau.
In modern times the local economy has been based on the industrial use of subsurface petroleum reserves, and since 1951 on the extraction and development of a very large natural gas reservoir underneath the city. Processing of the large quantities of hydrogen sulfide in the gas have made Lacq a center of sulfur production.
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