A study published on September 5, 2025, in science revealed that U.S. mines are discarding enormous reserves of critical minerals in their tailings, raising alarms about missed opportunities for supply security. Researchers estimate that the waste streams contain enough lithium to power 10 million electric vehicles per year and enough manganese for nearly 100 million vehicles. These findings underscore both the magnitude of untapped resources hidden in mining byproducts and the inefficiencies of current extraction practices in one of the world’s leading mining countries.
The timing of the study is particularly relevant, as the United States intensifies efforts to reduce dependence on foreign suppliers for minerals essential to clean energy technologies. With geopolitical competition for resources intensifying, ignoring the mineral potential in tailings could undermine national supply chain resilience. Reprocessing mine waste offers a dual advantage: providing a domestic, lower-impact source of critical minerals and addressing long-standing environmental concerns associated with tailings management.
Realizing this potential, however, demands significant technological innovation, supportive regulation, and private sector investment. Developing cost-effective methods to extract minerals from tailings at scale will be essential to make reprocessing viable. If achieved, the U.S. could turn a historical liability into a strategic asset, boosting competitiveness in the global energy transition. The September 5 findings suggest that the path to mineral security lies not only in new mines but also in rethinking how to harness what has long been treated as waste.