Sometimes I amazed that (some) scientist are considered so smart. They get sop busy looking at chemicals they can "build" to take care of problems that they seem to overlook the obvious. Nature being the obvious here.
I saw this article & even though it may not apply to home use...keep in mind that nature may have provided a solution to yet another problem. Guess what? Nature doesn't make all this stuff just so humans can go and destroy 1/4 of the earth just to figure out a solution that she already has the answer done for them...they just have to look.
Oh, here's the article Banana peel can purify water, say scientists. Just almost to simple huh?! Banana peels to remove copper & lead from water! These yummy fruits may also remove even more things. Oh, and you get to eat the banana they only used the peel. Guess banana peels aren't just for slap stick comedy anymore.
Mother Nature is just so cool...to bad so many people are out to kill her.