China Rare Earth Limits Said to Be Targeted by U.S.

China’s restrictions on the export of rare earths used in the manufacture of cell phones and radar are being targeted by the U.S. Trade Representative for a potential trade case, according to industry representatives.

The U.S. has asked business groups and unions to provide evidence that China is hoarding these elements for a case that may be filed at the World Trade Organization, according to the people, who asked not to be identified because the talks were confidential.