Two years ago, Eben Bayer was given a college assignment to create a sustainable insulation. Since he grew up on a mushroom farm in Vermont, he immediately gravitating to growing mushrooms as eco-friendly insulation. He and colleague Gavin McIntyre used a "fire-retardant board made of water, flour, oyster mushroom spores and perlite, a mineral blend found in potting soil" to create their now patented "Greensulate" technology.
The former Rensselaer Polytechnic Institute graduates expect the product to be ready for development in about a year. Link [abc news]