Sardinia world (22 centenarians/100,000 inhabitants). Sardinia is the first discovered Blue Zone, a demographic and/or geographic area in the world with an oversize concentration of centenarians and supercentenarians. In 2016 there were 50,346 foreign national residents, forming 3% of the total Sardinian population. The most represented nationalities were: Sardinia's most populated cities are Cagliari and Sassari. The Metropolitan City of Cagliari has 431,302 inhabitants, or about ¼ of the population of the entire island. Eurostat has identified in Sardinia two Functional Urban Areas: Cagliari, with 477,000 inhabitants, and Sassari, with 222,000 inhabitants. Sardinia is one of the five Italian autonomous regions,
Sardinia which grows naturally; Sardinia produces about 80% of Italian. The cork district, in the northern part of the Gallura region, around Calangianus and Tempio Pausania, is composed of 130 companies. Every year in Sardinia 200,000 quintals (20,000 tonnes) of cork are carved, and 40% of the end products are exported. In fresh food, as well as artichokes, the production of tomatoes (including Camoni tomato) and citrus fruit are of a certain weight. Sardinia is the 5th Italian region for rice production, the main paddy fields are located in the Arborea Plain. In addition to meat, Sardinia produces a wide variety