Brazil (brəˈzɪl ( listen); Portuguese: Brasil [bɾaˈziw][11]), officially the Federative Republic of Brazil (Portuguese: República Federativa do Brasil,  listen (help·info)[12]), is the largest country in both South America and Latin America. As the world's fifth-largest country by both area and population, it is the largest country to have Portuguese as an official language and the only one in the Americas.[13][14] Bounded by the Atlantic Ocean on the east, Brazil has a coastline of 7,491 kilometers (4,655 mi)[15] It borders all other South American countries except Ecuador and Chile and covers 47.3% of the continent's land area.[16] Its Amazon River basin includes a vast tropical forest, home to diverse wildlife, a variety of ecological systems, and extensive natural resources spanning numerous protected habitats.[15] This unique environmental heritage makes Brazil one of 17 megadiverse countries, and is the subject of significant global interest and debate regarding deforestation and environmental protection.