; and (ii) 22 were imported by the United States to fulfill greater than 50 percent of the requirements of the United States for those nonfuel mineral materials; (C) according to the Department of Energy, the United States imports greater than 50 percent of the 41 metals and minerals key to clean energy applications; (D) the United States share of worldwide mineral exploration dollars was 7 percent in 2015, down from 19 percent in the early 1990s; (E) the 2014 Ranking of Countries for Mining Investment, which ranks 25 major mining countries, found that 7- to 10-year permitting delays are the most significant risk to mining projects in the United States; and (F) in late 2016, the Government Accountability Office found that— (i) the Federal government’s approach to addressing critical materials supply issues has not been consistent with selected key practices for interagency collaboration, such as ensuring that agencies’ roles and responsibilities are clearly defined ; and (ii) the Federal critical materials approach faces other limitations, including data limitations and a focus on only a subset of critical materials, a limited focus on domestic production of critical materials, and limited engagement with industry . 3. Definitions In this Act: (1) Agency The term agency means— (A) any agency, department, or other unit of Federal, State, local, or tribal government