Just when you thought it couldn't get more dangerous than a knife-wielding fan, our home workshop section had to publish a misguided article about uses for leftover asbestos shingles. In the office, an asbestos shingle could prevent typewriters and telephones from slipping. In the home, it could be used as a hotplate for cooking or beneath an iron to protect clothing.
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.