My parents owned land not to far from Dogpatch, We went down every summer for about 7 years in the 70's. I still drink from a coffee cup from there i got when i was 3
Now this is only a rough estimate, but about 39111 trees would be used for 5 billion pages. 1 4x4x8 foot stack of wood will give you about 90000 sheets of paper.
1 4x4x8 foot stack of wood will give you about 90000 sheets of paper.