Scooters and motorcycles can pollute 90 times as much as SUVs

Ecomodder has an interesting article that claims scooters are not environmentally friendly options for transportation.

...the EPA that tested a Yamaha YZR R6 and found that it emitted 90 times more hydrocarbons than a Dodge Durango SUV. Hydrocarbons are the pollutants responsible for forming ozone and smog, which is both a serious health risk as well as an extreme eyesore.
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On the other hand, however, you’d be getting 2-4 times the fuel economy and emitting fewer green house gases. However, the magnitude that these are reduced is tremendously outweighed by the magnitude that smog-forming pollutants are increased. Nevertheless, you will save money on gas, but riding a scooter isn’t quite as safe or air-conditioned as a car.

I tend to agree with their conclusion. If you are taking a short trip, ride your bike. It's much safer, it's better for you and keeps you in shape, and it is the best option for the environment.