The rare earth elements (REE) are 15 elements with atomic no. 57 through 71, from lanthanum to lutetium, plus yttrium. Although industrial demand for these elem

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced

All the solid fuels fossil energy and mineral commodities we use come out of the Earth. Modern society is increasingly dependent on mineral and fossil energy so

As the importance and dependence of specific mineral commodities increase, so does concern about their supply. The United States is currently 100 percent relian