I thought most of our fossil fuels come from a time before fungi evolved the ability to digest lignin and other plant tissues. Thus piles and piles or wood and

I thought most of our fossil fuels come from a time before fungi evolved the ability to digest lignin and other plant tissues. Thus piles and piles or wood and other detritus would end up undergoing very inefficient/incomplete combustion or being buried without decaying for a long time. So basically that amount of sequestration could not happen again without some technological help now that the “digesting wood” abilities have become commonplace.