We've already caught a glimpse of life at the Centre for Alternative Technology (CAT), one of Europe's leading eco-centers. This former quarry turned hippy commune turned research institution and visitors center is a little different than your average community. From homegrown food to self-generated energy, these guys are a step ahead in terms of taking responsibility for their own impact. CAT's latest blog post traces the community's water cycle from reservoir's above them, through a low energy, gravity-fed siphon system, various filters, to human use and then reed-bed waste water treatment. I have little doubt that knowing exactly where you water comes from, how it will be used, and where it will be discharged completely transforms your relationship with it and how it is used. Somehow I doubt these guys would drain a reservoir just because someone pissed in it. Then again, they probably wouldn't piss in it in the first place—figuratively or literally.