It's all context. Nuclear waste (as in from commercial plants) has yet to kill anyone in the U.S. and it decays to lead eventually. However, mercury, which ne

It's all context. Nuclear waste (as in from commercial plants) has yet to kill anyone in the U.S. and it decays to lead eventually. However, mercury, which never decays, is a byproduct of many processes (not to mention coal burning) and kills/maims many.