Greenhouse effect

What is the byproduct of methane when used as a fuel source, and does it contribute more to the green house effect when used as fuel than just straight methan gas, or is it cleaner?

In case any of that was really your opinion:
I am not sure of the statistics regarding mental illness rates between the USA and the entirety of Europe, so I will trust you on that.
They're "Hummers", and they are retardedly expensive and get horrible mileage, no sane person buys one.  A few trophy wives with 4 inch long nails and rich impotant guys buy them.  No one likes American cars, maybe trucks.  The top selling cars here have been Asian for a while.  There's a reason they're all panicking in Detroit.
No one drives to get a newspaper, we have them delivered to us, or we get them where we're going to for breakfast, or on the way to work.
No one calls them freedom fries, most Americans thought that was base and stupid.
Regarding NASCAR:
The Southern USA seceded almost 150 years ago.  Even though we in the North forced them back into reunification, many of us currently recognize the Mason-Dixon Line as our country's southern border.  While there are people who watch NASCAR in the North, it is a Southern tradition, and they are encouraged to watch it only for crashes, and plate memorabilia are strongly ridiculed.  While I don't watch NASCAR, I imagine it's a lot like watching a horse race.. for a few hours.
Lastly, our TVs are HUEG.