As per a new study, 1 in 3 children worldwide are threatened by high levels of _______ chemical element in their blood ?

a) Iron
b) Lead
c) Sulphur
d) None of these

According to a new study, one in three children worldwide are threatened by unacceptably high lead levels in the blood. The study notes that lead recycling is often done haphazardly in poor and middle-income countries where industrial pollution safeguards are poorly enforced or nonexistent.