But the very same rejected meat could be sold in the United States , since no limit has been set , the analysis says . Official : Federal agencies fail to set limits on potentially harmful chemical residues . In U.S. , there are no set limits for some heavy metals , like copper , in beef . Comment:
Official : Federal agencies fail to set limits on potentially harmful chemical residues . In U.S. , there are no set limits for some heavy metals , like copper , in beef . Comment: