PALO ALTO, Calif.--This is sort of like the "two, two, two mints in one" solution for the clean-tech set.
Australia's Terra Fuel Technologies has come up with a device that, when added to a diesel car, bus or truck, lets the vehicle also run partly on ethanol. You need to add a second gas tank on the vehicle to hold ethanol, but in the end, it's an ethanol-diesel car. The device, a black box, controls the flow of ethanol into the engine.
The company has tested it and will start selling it in the United … Read more