Mining is fascinating. As the world progresses, there is increased demand for commodities needed for new technologies. Many of these commodities were not even known five years ago. In the past, several deposits were mined for completely different minerals to what they are being developed for today. In some cases, valuable minerals were discarded on waste dumps, as there was no need for them a century ago. In other instances, the price of a commodity that might have been high in demand 50 years a 更多
