Bamboo fiber is more sustainable than wood fiber for TP because it can grow as much as an inch-per-hour. It costs more now, but if people made the switch to bamboo, which FEELS THE SAME, it would certainly help the situation and prices would come down.

Also, the life expectancy (not including infant mortality) of ancient Romans was about 50, so they only had half a century of public pooping, shared sponges and pee-soaked clothing before they found Life's Exit.