By Max Fischer
Posted 01.30.2012 at 11:59 am 7 Comments
While battery-powered yard tools are quiet, efficient and hassle free, they rarely pack the same power as their gas-consuming counterparts. But new electric yard tools with bigger batteries have muscle that rivals their gaseous brethren.
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.