“…In 2020 and 2021, JOM advisors of the Recycling and Environmental Technologies Committee and the Process Technology and Modeling Committee of TMS-The Minerals, Metals & Materials Society-organized special topics focusing on improved extractions and recoveries of the strategic metals: ''Cleaner Manufacturing of Critical Metals'' 2 and ''Thermodynamic Optimization of Critical Metals Processing and Recovery''. 3,4 For this special topic, original research and review papers focusing on technology metals recycling were invited, and eight papers were selected for publication after a peer review. The peer-reviewed papers in this special topic should be of interest to a broad readership including those contributing to resource security and promoting sustainable production of strategic metals from the municipal and industrial waste streams.…”