When pushing for greater use of natural gas vehicles, advocates know patience is a virtue. A lot of patience.
One recent tangle, a regular Gordian knot, has been the question of how LNG used as a transportation fuel should be measured and taxed. Should it be by weight, like kilograms, or volume, such as diesel and gasoline gallon equivalents (DGE or GGE).
This is no small picky detail that excites policy wonks. It matters a great deal to current and future LNG vehicle owners and state tax collectors.