That’s a great point. We had the carboniferous period in ancient history and all that carbon had been locked up. We’re not going to be able to put it back with

That’s a great point. We had the carboniferous period in ancient history and all that carbon had been locked up. We’re not going to be able to put it back with plants. Our plants aren’t the same and mushrooms exist. “The Carboniferous trees made extensive use of lignin. They had bark to wood ratios of 8 to 1, and even as high as 20 to 1. This compares to modern values less than 1 to 4. This bark, which must have been used as support as well as protection, probably had 38% to 58% lignin.[citation needed] Lignin is insoluble, too large to pass through cell walls, too heterogeneous for specific enzymes, and toxic, so that few organisms other than Basidiomycetes fungi can degrade it.”