I would assume that a "carbon footprint" and fuel consumption per passenger for type of transportation varies depending on how many are traveling at one time. I've heard that, for a trip with 100 or more passengers, a train is more fuel-efficient than a bus. However, for trips with fewer than 100 passengers, is a bus "greener"? Is there a point at which traveling by plane is more fuel-efficient than traveling by either bus or train? And does the carbon footprint of a plane with enough passengers ever get smaller than that of either buses or trains carrying the same number of passengers?
OTOH, with the developing "climategate" scandal coming out (indicating that much of the fear about the effects of carbon emissions on global warming may have been manufactured), does any of this really matter?
OTOH, with the developing "climategate" scandal coming out (indicating that much of the fear about the effects of carbon emissions on global warming may have been manufactured), does any of this really matter?