Internet via Light Bulbs
WiFi is great, of course, but it's not a bummer-free technology. When lots of people connect to the same signal, speed drops, and electromagnetic waves probably aren't the best thing for our health. But a new invention called D-Light, by German physicist Harald Haas, imagines a future where super-fast internet is transmitted through LED light bulbs. The idea is in its infancy now, but it could eventually open up a world of high-tech possibilities.
An electricity free light bulb, Liter of Light, uses plastic bottles to illuminate the homes of the global poor.
Photo via (cc) otto-otto.com