Rangeland in regions too dry to support a forest, but not dry enough to be a desert. Pampas are the fertile South American lowlands that include the Argentine provinces of Buenos Aires, La Pampa, Santa Fe, Entre Ríos and Córdoba, most of Uruguay, and the State of Rio Grande do Sul, in the southernmost end of Brazil covering more than . These vast plains are only interrupted by the low Ventana and Tandil hills near Bahía Blanca and Tandil (Argentina), with a height of and respectively. The climate is mild, with precipitation of to , more or less evenly distributed through
Union of South American Nations connections of the ports to Bolivia and more internal parts of Argentina, Peru And Brazil. The Pacific Highway, between Peru and Brazil, began to be built in September 2005, financed 60% by Brazil and 40% by Peru, and was completed in December 2010. The South American Energy Ring will interconnect Argentina, Brazil, Chile, Paraguay and Uruguay with natural gas from various sources, such as the Camisea Gas project in Peru and the Tarija gas deposits in Bolivia. Although this proposal has been signed and ratified, political and economic difficulties in Argentina and Bolivia have delayed this initiative, and to this