I believe that number is purely the water used converting pulp into paper, not water consumed growing trees. I've heard it's 400 parts water and one part pulp,

I believe that number is purely the water used converting pulp into paper, not water consumed growing trees. I've heard it's 400 parts water and one part pulp, not sure how accurate that is.[1] [1]: http://www.alternet.org/environment/whats-better-environment-paper-bags-or-reusable-plastic-bags http://www.alternet.org/environment/whats-better-environment...