Juliana Stiefel, Biochemistry of San Martin de las Escobas(Santa Fe), writes to us: In my locality and by initiative of the primary school they are collecting used batteries, but reason why I know the subject, is not easy the decontamination of them, if there have been no changes, I have understood that the only thing that it is possible to be done is to confine them in closed cement containers. ¿Do you knowk about some change on the matter? My consultation is because it seems to me that that is it somewhat risky that small children of the primary school are manipulating this type of toxics without a complete knowledge of the subject. ¿Can you send information on the matter to me or some Internet address. Thank you very much Answer:There have been changes in this subject. See the links in our Spanish answer.