Rather than storing dirt in bags or cylinders, this vacuum is the first to form dust into solid cubes, thus lowering the risk of allergens escaping back into the room. The system also allows four times as much storage as other vacuums-by our calculations, making vacuuming four times as fun. The Kompressor From approx. $200; lge.com
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.