[Greenbuilding] cost of electric versus natural gas and gasoline

[Benjamin Pratt]

I'm paying about .086 per kWh for electric and 1.02 per therm for
natural gas (in US dollars). Would anyone be willing to do the math
and tell me which is the less costly energy source?
I'd be curious as to the cost of electric versus gasoline (at 3.20 a
gallon) for the purposes of powering a car. I know in California,
people are hacking their Hybrids to make them plug-in, but i have no
idea if that would make sense here.
   Also, anyone have any views on which energy source will increase in
cost more quickly in the future? I'm in Saint Paul, MN
-Ben

-- 
Ben Pratt
Professor, Design