While the hysteria of the Zika virus causing a few hundred birth defects becomes 24 hour news don't forget that Depleted Uranium has caused hundreds of thousands of birth defects:

Several studies using cultured cells and laboratory rodents suggest the possibility of leukemogenic, genetic, reproductive, and neurological effects from chronic exposure. A 2005 epidemiology review concluded: "In aggregate the human epidemiological evidence is consistent with increased risk of birth defects in offspring of persons exposed to DU."