I was just reading an article about paper recycling and it says that "paper can be recycled up to 6 times".
I imagine recycling factories that receive huge amounts of of newspapers, books, cardboard, gift wrapping, shredded documents, and all other kinds of home and industrial paper waste, and I wonder.
If there is this limit on how many times each piece of paper can be recycled how do they sort that, how do they know how many times each individual sheet of paper has been recycled and reject the oldest ones??