The Phill home refueling station from Fuelmaker can fill the Civic GX at around $1.30 for the equivalent of a gallon of gas. The tank is installed by a plumber into your existing natural-gas line and fuels the GX from empty in 16 hours. Why the wait? The unit lacks a built-in compressor, which CNG stations use to rapidly cram gas into your tank, so it lets the pressure build slowly. $3,400; fuelmaker.com
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.