I believe that theory is no longer valid. It was supposedly fungus that feeds on woody plants that resulted in a drop in lignin rich coal but that doesn't seem

I believe that theory is no longer valid. It was supposedly fungus that feeds on woody plants that resulted in a drop in lignin rich coal but that doesn't seem to quite work out. Coal is formed when there's a lot of organic matter that gets trapped in an oxygen poor environment and then buried and compressed over time. That process is certainly still happening though not at the same rate it has in the past. This article has some good details https://arstechnica.com/science/2016/01/why-was-most-of-the-earths-coal-made-all-at-once/ https://arstechnica.com/science/2016/01/why-was-most-of-the-... There's still quite a lot of coal though.