Check out this, using moss to purify your swimming water. And they're already on the way to developing it so that it can purify your drinking water (it already can yet they're just developing the system). The concept of swimming water without chlorine, that's what's happening (insert Rerun doing the Campbell Lock here). I always hated swimming in chlorinated pools when I was younger. It seemed counter productive to me that you had to take a shower after you got out of a damn pool fool of water.Now the key with this, as with all eco-technologies, is not to rape the environment. Yes moss may fit that niche yet next thing you know they are over farming it, destroying other natural niches, and still causing havoc with the environment. Yet all in all its a good look.