Santiago, Chile (also known as Santiago de Chile) is the capital of Chile and the largest city in the country. It has a population of around 7 million people, about 35.9 percent of the population of South America. In Chile, people call the city Gran Santiago (Big Santiago) or Santiago. It has 26 comunas (municipalities).
With its geographical conditions, because it is located in a valley surrounded by the Andes mountains, Santiago has a large amount of air pollution.