Vale are publicly making an attempt to regenerate the forest where the mine has been, here a planting programme with native species of plants is underway, but many say it is too little too late. The Carajas Open Cast Iron Ore mine is the largest iron mine in the World, estimates say the site can be mined at today's rates for another 400 years. In the Amazonian State of Para, Brazil, it is operated by the State owned Vale mining corporation, prevoously CVRD. The company has come under some controversy about the mine, and recently has started expanding the mine on the site of a series of ancient caves.