The 2.6-pound InaTrap eliminates insects without poison or zapping. When exposed to heat from an LED, the bulb’s titanium-dioxide coating reacts with the air and produces CO2, which attracts mosquitoes. A fan then pulls bugs into a holding tank. Acase Inadays InaTrap$90
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.