Mycelium, the root part of mushrooms, is recently being turned into a healthy and versatile building material. It’s used to make everything from lampshades and acoustic panels to furniture and foam alternatives. Because it's grown rather than manufactured, mycelium furniture is naturally biodegradable and carbon-negative, capturing carbon dioxide as it grows instead of releasing it the way plastic and foam production does. This makes it one of the more literal expressions of biophilic design, the practice of connecting the spaces we live in to the natural world, since the material itself is a living organism.