5 mins | DW NEWS | Without copper, the economy and modern high-tech industries would come to a stand-still. Copper is used in computers, cell phones, automobiles, and nearly all electrical devices. About one-third of global copper reserves are found in Chile, making the country the world's largest exporter. Copper is a substantial contributor to Chile's economy, and the demand for the metal is on the rise. The copper mine de los Pelambres, some 250 kilometers north of Santiago, is the fifth largest in the world. The mine produces some 300,000 tons of copper each year -- using a state of the art and highly-efficient ore-grinding system from Siemens.