These folks have figured out how to make burnable fuel from junk mail. You toss all your junk mail, newspaper, cardboard boxes, and the like (“anything that isn’t shiny”) into a five gallon bucket of water and let it soak for a good long time. Then you use a cuttting tool attached to a power drill to turn the water and paper into pulp. Then squeeze the water out and let the bricks dry for two weeks or longer. Free firewood!