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Title
Resin extraction in the spanish Hoces del Rio Duratón National Park #227805144
Description
Resin extraction consists of incising the outer layers of a pine tree or partially removing the bark in order to collect the sap or resin, that circulates throughout a coniferous tree, and serves to seal damage to the tree. Harvesting pine resin dates back to Gallo-Roman times in Gascony.