Coal: The Most Mined Mineral on Earth

Coal: The Most Mined Mineral on Earth The Rock That Changed the World Coal is a combustible black or brownish-black sedimentary rock formed from ancient plant matter subjected to intense heat and pressure over tens to hundreds of millions of years. Coal opened the door to massive industrialization and, because of this, consumption. It drove economic growth and helps to power electricity grids. It really is a rock that changed our world. Its transformation, known as coalification, takes place...