Assertion: waste's element | /r/ObjectUse | used in catalyst
Facets:
Source sentences:
text: Rare earth elements (REEs) are a group of 17 elements used in various products such as alloys, batteries, and catalysts, with over 60% used as catalysts.5,6 Substitute for REEs are available but are less effective.5 China controlled more than 71% of REE production in 2018.5