Communications of the ACM
ACM Opinion
What Are Rare Earths, Crucial Elements in Modern Technology? 4 Questions Answered
A handful of europium.
Credit: Alchemist-hp, CC BY-SA
Most Americans use rare earth elements every day—without knowing it, or knowing anything about what they do. That could change, as these unusual materials are becoming a focal point in the escalating trade war between the U.S. and China.
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