Credit: Noah Kalina

Mason Greenstar combines Texan newspapers, phone books, lottery tickets, cement, and organic additives to create 10"-by-14"-by-4" building blocks that are 65% recycled cellulose. Resistant to fire, water, termite, mold, and ballistics, Blox provides an insulation factor of R3.2 per inch of thickness. With the appropriate finish coat, it can be used indoors and outdoors.