WorldChanging: Another World Is Here: Banana Paper
Current methods of making paper are often toxic, wasteful of water and energy, and terribly unsustainable. Recycling only goes so far; what’s needed is an alternative method of making paper that is less-harmful to begin with. Papyrus Australia thinks they have that alternative: Banana Ply Paper.

Would that be enough for world-wide consumption? I still think hemp is the best alternative to wood for paper.