User:Roberts397/sandbox

The copper reserves are between 25-60 years, but minute amounts of the mineral can be located in; the earths crust at 50 p.p.m.In soils at 20 p.p.m. Located in the sea water at 0.2 p.p.b. Also found in human flesh at 2-10 p.p.m.(Highest levels in the liver) and human bone up to 25 p.p.m. The only problem is extracting it from any of these locations cost effectively.