Geography of South America world by drainage area—the Amazon River and the more southerly Paraná River. The other major river of this central lowland is the Orinoco River, which has a natural channel linking it with the Amazon. Most of this central lowland is sparsely populated because the soils are heavily leached, but in the south is the very fertile pampas of Argentina—one of the world's major food-producing regions where wheat and beef cattle are pre-eminent. The natural vegetation of the northern lowlands are either savanna in the northern "llanos" and southern "campos", or tropical rainforest throughout most of the Amazon basin. Efforts to
Americans in Uruguay of birth; as of 2013, there were more than 300 American citizens registered in the Uruguayan social security. There is also another migration-related issue: during the 1960s, several Uruguayans migrated to the United States and had their children on North American soil. Lately, there are many of those people returning to Uruguay, so there are American-born children and young people who are now living in Uruguay. An educational institution, the Uruguayan American School (established 1960) serves both Uruguayan and American children. The Church of Jesus Christ of Latter-day Saints in Uruguay is present since 1947, with lots of American missionaries