Resources Science, Volume. 42, Issue 8, 1464(2020)
Fig. 1. Main global supply countries of CRMs (based on number of CRMs supplied, average 2012-2016)
Fig. 2. Cumulative frequencies of critical mineral policy texts in the selected four countries (regions)
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Jianping GE, Jiaqi LIU.
Received: Feb. 19, 2020
Accepted: --
Published Online: Apr. 23, 2021
The Author Email: GE Jianping (gejianping@cugb.edu.cn)