Switching away from clay tablets was a step in the wrong direction.

Those clay tablets needed to be fired and had a negative carbon footprint.

Handmade parchment, or leather carvings if you don’t mind.

Why fire them when you can just reuse them?

Those both require cattle farming, which is a major contributor to greenhouse gas emissions (at least 10%, perhaps as high as 19.6%, per https://thebreakthrough.org/issues/food-agriculture-environm...). Stick with papyrus or wax, please.