Chapter 77 - Chemical Processing CHEMICAL INDUSTRY. L. De Boer* *Adapted from 3rd edition, Encyclopaedia of Occupational Health and Safety. The business of the chemical industry is to change the chemical structure of natural materials in order to derive products of value to other industries or
Copper mining in the United States has been a major industry since the rise of the northern Michigan copper district in the 1840s. In 2017 the United States produced 1.27 million metric tonnes of copper, worth $8 billion, making it the world's fourth largest copper producer, after Chile, China, and Peru.