The small island of Saba, part of the Caribbean Netherlands, is largely made up of the remains of Mount Scenery, a potentially active volcano. In 2010 the Netherlands Antilles was dissolved and Saba became a special municipality of the Netherlands, however Saba has been in possession of the Netherlands since 1635. The major industries here started out as sugar, rum and fishing but now Saba relies on tourism and hosts a variety of restaurants and accommodations for people visiting. Dutch is the official language in Saba although English is also widely spoken. Saba is small, secluded and is also heavily forested; the population is less that 2,000 with most people tracing their ancestry back to the original inhabitants. Conservation is extremely important, with the Saba Conservation Foundation caring for the plants and animals in the nature reserves. Since most of the island slopes significantly from the peak of Mount Scenery, the islanders cannot depend on farming; instead most of its revenue comes from the sea and its visitors. There is only one road and one airport on the island too, the landing strip on the airport being one of the shortest commercial runways in the world. In addition to the native ethnic populations, who have mixed throughout the centuries, there is also a large expatriate community who have settled on Saba. The Saba University School of Medicine, the result of a collaboration of the Saba government and a group of Americans, is also located here. Overall, culture in Saba is diverse and related very much to the ocean and its environment; ecotourism being extremely popular now.