which produces about 450000 tons of copper annually voted to begin their strike on friday after could delco responded to the demands on health care costs and pensions with an offer of a 1.2 percent raise and a one time benefits package of about $20000.00 to delco management insisted that their offer was serious responsible and realistic the company cited competition from china as limiting what they could offer workers the mind and the harsh outcome a desert is the largest open pit copper mine on earth and codelco produces produces about one 3rd of the global copper supply. and in other south american metals news the bolivian government says it will build at least 14 new plants within 5 years as part of the so large a uni project the bolivian deputy energy minister said state lithium company y l b will partner with companies from china and germany on the new plants which will produce lithium hydroxide boric acid and sodium bromates lithium is a surprise commodity in the century for its role in batteries from cell phones to power plants the bolivian government says 70 percent of the world's t