I see. I guess anything can be harmful, depending on the amount, Just for the fun in trying to find a way to get cleaned water easily, maybe could we imagine different types of mosses absorbing different metals. But maybe I am just dreaming :)
Thanks for the extra info.
Hehe, yeah, imagine having several different species of mosses that your water would filtrate trough before reaching your faucet. It would for sure look really cool ;) Seems very unlikely. What we can hope for is for someone smart to be able to understand the mechanism behind how the cell wall removes the lead from the water, and maybe be able to replicate this mechanism in another device. If we could make something like that, then this discovery could potentially save lots of lives!