While we patiently wait for fuel-cell vehicles to appear at our neighborhood car dealers, a growing number of truckers are using hydrogen to boost the efficiency of their engines. Making good on science that’s been around since the 70s, an aftermarket gizmo made by the Canadian Hydrogen Energy Co. generates hydrogen onboard and injects it into the air intake of the motor. The result is an increase in horsepower and fuel economy, and a notable decrease in emissions. Cleverly, the devise, called the Hydrogen Fuel Injection (HFI) system, does not need a store of hydrogen, but makes its own as it goes. Using power from the engine’s alternator, it electrolyzes water to make hydrogen onboard. Hundreds of trucks in North America have installed HFI systems, and there have been many claims of positive results. Because of the relatively high cost, they make the most sense for trucks, but the company makes units suitable for passenger cars as well. :: Canadian Hydrogen Energy Co.