Apparently in Africa people have long compressed paper and other waste material to make bricks to use as cooking/heating fuel. I bought a paper brick-maker on-line and today made my first batch of bricks from newspaper and sawdust. It's a pretty simple contraption (and very inexpensive) and seems to work quite well. All you do is soak the newspaper and sawdust (or pulp from your juicer!) in a bucket or tub, then put the glop in molds, push down on the lever and, as my wife says, voila! I've bought bio-bricks in the past, which I really liked, but they are expensive. Free suits nicely, though, and what better way to get rid of junk mail than to watch it go up in flames?