Machu Picchu

A reader writes:

I am putting together a Moodle initiative for our district of roughly 12000 students. I asked our environmental manager for some data on our paper use. From March 08 through the present, we have blown through almost 4700 cases! Some quick math: 4700 cases x 10 reams per case x 2" high per case amounts to a stack of reams over 7800 feet high. The Sears tower is something like 1700 feet high (with antennas too). I don't even want to calculate the costs.

Um, wow. That's just about as tall as Machu Picchu...