Identification of legal and illegal Cannabis cultivation through lake sediment analysis

The paleoecological analysis of recent sediments from Lake Montcortès (central Pyrenees) revealed a significant peak of Cannabis pollen during the last two decades of the 20th century. This peak coincided with a period of extensive hemp cultivation (EHC) in central Catalonia between 1972 and 2006, intended to supply pulp for paper industry. After this period, […]