A message from Chinese scientists: "Stop throwing out your cigarette butts!" Researchers have devised a financially viable process for recycling cigarette leftovers to extract chemicals present in the filters. And doing your part to recycle cigarette butts could help save one of our most precious resources -- oil companies.
Unless you are a representative of a national meteorological bureau licensed to carry a barometer (and odds are you’re not), bringing mercury onboard an airplane is strictly forbidden. Why? If it got loose, it could rust the plane to pieces before it had a chance to land. You see, airplanes are made of aluminum, and aluminum is highly unstable.
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.