Mining plays an important role in US history. Miners have fought for better pay and safer working conditions. This book describes how mining has changed in what is now the United States from thousands of years ago to the present day, including the rise of new technologies and creation of laws to protect miners. Easy-to-read text, vivid images, and helpful back matter give readers a clear look at this subject. Features include a table of contents, infographics, a glossary, additional resources, and an index. Aligned to Common Core Standards and correlated to state standards. Core Library is an imprint of Abdo Publishing, a division of ABDO.