Environmental contamination is a growing problem and a major worldwide concern. Industrialization and overpopulation underlie it's first origins. Contamination has severe outcomes for the whole planet, and very particularly for mankind. But these consequences are specially ominous for childhood. Childs are more extensively exposed to contaminants than adults, for a longer period of time, and the effects are more deleterious as they act during the period of growth and development Concerning the risks associated to contaminants there is still a large paucity of data, particularly as referred to low grade exposure.