By Sarah Parsons
Posted 04.01.2010 at 1:10 pm 11 Comments
Solar power sounds great: electricity from sunshine, for free, no carbon footprint. But solar panels often come with hefty price tags or require complex installations. Now lighter materials are making them less expensive and more convenient, whether you carry them with you or snap them onto your roof.
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.