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A comment on People have no bloody idea about saving energy. Parent comment

Re:People have no bloody idea about saving energy by btilly on Wednesday August 18, 2010 @03:54PM (#1615384)
According to http://www.epa.gov/oms/climate/420f05004.htm cars also produce significant amounts of methane and nitrous oxide, which are both greenhouse gases. However good old CO2 represents 94-95 percent of the greenhouse potential from your average car.

So no, it is not all CO2, but the rest is a rounding error.

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Re:People have no bloody idea about saving energy by InclinedPlane on Wednesday August 18, 2010 @03:59PM (#1615408)
Precisely. If you're talking about greenhouse impact, MPG is the only important measure.

If you're cared about pollution aside from that then yes, there are huge differences depending on make, model, maintenance, etc.

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Re:People have no bloody idea about saving energy by eru on Wednesday August 18, 2010 @06:58PM (#1615895)
Should the water vapour also be an important part of your cars greenhouse gases?

(See http://en.wikipedia.org/wiki/Greenhouse_gas#Role_of_water_va...)

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