By Sarah Fecht
Posted 11.11.2011 at 12:08 pm 2 Comments
As telephone landlines become obsolete, so do the hardwired security systems that rely on them. Cellular modems and Wi-Fi receivers are now so affordable that manufacturers can install them in security devices for a nominal cost. Meanwhile, the proliferation of smartphones means that more people have the ability to receive texts, e-mails and live video from a home monitor.
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.