Great... can you post some links to non Metabunk sites exhibiting them or sites where you do not have to download gigs of photo's that are unveiwable...
http://www.scientificamerican.com/podcast/episode.cfm?id=can-genetically-modified-crops-feed-09-04-16
A study from the Union of Concerned Scientists...
I too love playing around with fires. I have spent many happy times chatting with a glass of wine around massive bonfires, long in the making and up...
It sounds pretty much like a fire pit, especially once it is covered over. You said about the rocks around it, they are for reflecting, concentrating...
I think that is probably the same principle as the coal mine fires, massive highly combustible fuel source but instead of the mine tunnels and vents...