The islands of the Caribbean basin are predominantly net energy importers, with the exception of Trinidad and Tobago. Agriculture and natural resource extraction activities continue to constitute the basis of the islands' economies, though the tourism and service sectors are growing. In recent years, there has been concern that higher global oil prices will impair the Caribbean economies, as they are highly dependent upon oil for the energy needs. In response, the island nations have been discussing ways to promote alternative energy sources and better integrate their energy sectors.