Quote:
Originally Posted by dcb
I think if you have a 4 stroke, your CO2 output is much more porportional to fuel consumed, be it car or bike.
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CO2 emissions are always proportional to fuel consumed. Unless you're e.g. dumping out a lot of unburned fuel, the HC & CO emissions are very small percentages of the exhaust. So it depends: if the scooter replaces a car, it reduces CO2; if it replaces bike or feet, it increases CO2.