Propane is expensive right now so I've been throwing around the idea of building a wood fired forge. I've been keeping all my small birch cut-offs (2x2x2) and drying them for when I make one. My question is: Does burning green wood in a forge create problems like oxygen and scale build up? I know people who burn green alder and green birch in their stoves but should I go with only seasoned wood for a forge? Just for the fact it produces more heat anyway?