If you read the article it has a coating on it which makes it water and fire resistant. This coating strengthens and protects the cardboard... from bugs as well.
Very interesting and recycling is a good thing when there is economic as well as environmental benefit. One thing: Cardboard is biodegradable and is a renewable resource... I have never understood the supermarkets aversion to good old fashioned paper bags...
Your late for work (again), and your boss asks, "What is your excuse THIS time?"
You answer, "Silverfish...they ate my ride."
:-)