A team of researchers from Lawrence Livermore National Laboratory, Barnard College, Columbia University, University of Dhaka, Desert Research Institute and University of Tennessee found that the arsenic in groundwater in the region is part of a natural process that predates any recent human interaction, such as intensive pumping.
Fuente : http://www.eurekalert.org/pub_releases/2013-03/dln...
Fuente : http://www.eurekalert.org/pub_releases/2013-03/dln...