Mexicans who have no Indian blood would still be classified as Hispanic, a race classification that is not genetically determined. Be careful though, lumping all Native Americans is one huge group is not being very respectful of them.
Lead wheel weights have been banned in the EU since July 2005, and Japan and Korea are phasing them out. Yet EPA has refused to enact a ban, instead relying on voluntary industry action.
A: Good question. The truth is that lead-based paint was banned by the U.S. Consumer Product Safety Commission in 1978 after it was found to have disturbing health implications. One of the key studies that led (pun intended) to the ban of lead in paint and in gasoline is as dramatic as a Hollywood movie.