Engineering, Chemistry, and Environmental Science, Grades 9 on up.STEM. -Why is manganese becoming increasingly more important? -Learn about the mining of manganese in Maine, where according to Dr. Chunseng Wang of the University of Maine, Presque Isle, there is more than 90 percent of the country’s manganese.-Where in Maine are the deposits of manganese? Several maps, starting 450 million years ago with Pangea, are included with background information.Assign students to conduct data-based resea