The bubbles travel along the hull, reducing friction and thus, increase gas mileage. Since ships are one of the largest consumers of diesel fuel in the world, so this idea is meant to get some attention along with some other ideas like boats attaching a giant wind turbine or adding parachute-like sails on the ship to increase efficiency.
I agree with that logic, though from my perspective "mp$" could be even more useful as we enter a world in which the gallons we're using aren't directly comparable, and as electricity enters the transportation mainstream, resisting easy conversion to gallons without heroic assumptions and creating potentially over-optimistic assessments of the overall efficiency of plug-in hybrid cars.
Miles per dollar has much to recommend it, particularly for its simplicity and alignment with the priority consumers put on value. However, it also has two key disadvantages. Unlike mpg, it changes every time fuel prices do, so any comparisons based on mp$ are only snapshots at a point in time. Nor does it address the emissions associated with that dollar's worth of energy, though mpg doesn't do that, either.
In effort to move along the environmental message, British Liberal Democrats announced plans to abolish both gasoline and diesel powered vehicles by 2040.
The Ecowatts Thermal Energy Cell (TEC) is an electrolysis based energy cell that converts electrical power into heat at an efficiency significantly greater than that of a conventional immersion heater. This is achieved without the consumption of additional fossil fuels.
The system has been independently, scientifically verified to produce 1.5 to 2 times as much energy out as was put in.
