"Charcoal" literally means "coal made by charring [implicitly: wood]". I assume you (and probably rootusrootus) mean "No regular brand of charcoal contains [fos

"Charcoal" literally means "coal made by charring [implicitly: wood]". I assume you (and probably rootusrootus) mean "No regular brand of charcoal contains [fossil] coal." (eg, lignite, bitumite, or anthracite). (I don't know what they're on about either; presumably for sufficiently historical values of "conventional" barbecue coal was supplied from the same mines as train / steam engine / home heating coal, but that isn't much of a thing anymore.)