Wasting water is a big thing with me.  I take shorter showers, I try not to leave the water on when washing dishes and I don't wash my car (the rain does it for me).  I came across this cool water saving contraption.  This is an Eco friendly toilet I found when researching bathroom sustainable ideas.  Here is a great simple system that makes use of the fact that toilet water doesn't have to be as clean as it usually is.  This concept uses 50% reused water and 50% new water for a toilet system.  It's half-ways to nature friendly toilet.