Making the toilet experience greener

Recently I purchased some toilet paper... however when I was at the store I could only get 24 single rolls.
No big deal or is it?
For quite some time I have been buying only the 12 double roll packages. The main reason I was doing that was because the single rolls seemed to be getting smaller and smaller. It seemed like every three or four visits to the facilities it was time to change the roll... so I went to the double rolls which last much longer.
Last week, I was at a store that had both the singles and doubles there. To my surprise there was exactly the same amount of toilet paper in the package, even if the 24 package looked bigger.
Later that day I found myself sitting on the throne doing what so many people do... thinking about toilet paper and how the experience could be so much more green (and no I am not talking about eating more spicy food or beans to change the colour of the air).
The single package has the same amount of tissue in it but has 24 center tubes. The double packages have 12 center tubes and less plastic packaging on the outside.
To me it seems like a no brainer how the experience can be made greener. Outlaw the single roll product all together and conserve paper/trees and use less plastic packaging.
Another thing that could be done is to stop bleaching the tissue white. In most European countries the colour is off white or in other words is unbleached. That to is good for the environment and who really cares what colour it is when you are wiping?
–Until then,
Ken