[Geology2] Re: your opinions

Sounds like you have some experience in this. What does it mean when you say the plants operate at 31-33% efficiency? How does that translate into information about CO2? What mpg does that assume? Can you walk us through how you can compare the amount of CO2 coming from the plant to the amount coming out of the car.

--- In geology2@yahoogroups.com, ChuckB <gumboyaya@...> wrote:
>
> On 8/16/2013 11:46 AM, Canie wrote:
> >
> > I am of the opinion that electric cars actually use MORE carbon
> > energy than our gas driven cars. ...
> >
>
> Coal power plants operate at 31-33% efficiency. Even with about 10% loss
> during transmission and battery charging, you end up with about the same
> tonnage in carbon in the atmosphere for the mileage of transportation.
> What tips the balance is that about 20% of the electricity in the U.S.
> is produced by nuclear and hydro power, which produce no carbon. OTOH,
> it takes a lot more energy, and polluting materials, to construct an
> electric rather than an internal combustion vehicle. It is not at all
> clear that the extra expense is worth the marginal improvement.
>
> Chuck
>




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