I've heard the argument put forward before that if you source your electricity from a green power scheme, you can basicaly use as much as you want (guilt free!) without consideration of useage as the money spent is going to purchase an equal amount of green power as you take from the grid. Does this argument hold up? Why would you be persuaded to conserve power? There is also the extra embedded energy that goes into making the source of electricity - in my case, building the Snowy River hydro project. And apart from the argument that small self reliance is good itself, what other reasons would there be to limit useage?