Of course we should let trees grows and use other means of making paper BUT let us consider the context of the thread as opposed to reality for a moment. So instead of electronic only reading, hemp paper and cutting down trees. The solution is obvious. Inside every book is a button that replenishes any tree or wood source it was made from while still keeping the book intact. So you'd go to the back of the book, click the button and then POOF the tree(s) magically grows back from where it was cut down.
Okay a button that replenishes trees, gives the reader a teleporter, hard drugs, snacks and 10,000 dollars all in a bright 70s Fonz Lunch box.
And if you live in Colorado or California, wouldn't it make more sense to have rolling papers made from it?