hm..i think that we had wasted a lot of energy.
actually, i think that we maybe can produce the energy from drain, shower, pipe, etc. Maybe it is just a little energy that will produce but if the water flow everyday, so it will produce more energy right?
hm..i need opinions for this issue please...

Real Goods ( http://www.realgoods.com ) has micro-hydro electric generating units, and probably others do too.
These units can be used in small streams. Malaysia also has good solar for PV panels. People do waste a lot of power all over, because they are uncaring and ignorant, plus plain lazy.
The problems of the world environment have one root cause, and that is too many people. So do not conserve people, but do conserve everything else.:GEEK: