Overview
this guide tells you how to get basically infinite coal
step 1
put coal in a furnace or cauldron
step 2
smelt/cook something and when it smelts/cooks 1 item take the coal out and put it back in and repeat this each time it smelts/cooks 1 item
you now have infinite coal
if you do this you wont lose coal after smelting or cooking an item so you basically have infinite coal