No Tree hugger

Little Bear loves to 'play' with the toilet paper rolls when he is using the bathroom..Its his favorite pastime as he sits on the potty...He unrolls the toilet paper, then attempts to roll it and then proceeds to tear it and litter the floor with the pieces. As a result there is plenty of ' Don't do that'...'Don't make a mess'....and so on that ensues everytime he uses the potty. On one such occasion in an attempt to discourage this, I resorted to appealing to his logic and this is what followed:
Me: "Lets not waste toilet paper. You know where we get toilet paper from?"
Little Bear: "Where do we get it from? Amma.."
Me (pleased to have his attenton): "from trees. Trees get sad when you waste toilet paper" (Now, I also have the dad's attention)
Little Bear: "How do we get it from trees"
Me: "the wood from the tree is used to make wood pulp and then paper. So, if you waste paper you have to cut more trees"
Little Bear: "But.Why do we need trees?"
Me: (I was not prepared for this part and digressed): "If we don't have trees we wont have oxygen to breathe"
Little Bear: "We don't need oxygen from trees. We can use it from oxygen tanks like firefighters use"
Me: shocked and speechless.

I'm still working on refining my "tree" story.