I would think that choosing to drive a Vespa instead of an SUV would be environmentally conscious enough, but if that doesn't do the trick for you now you can step up your Ed Bagley Jr.-ness. Vespa has just unveiled two hybrid scooters that promise 25% more power using 20% less gas.
They've put a stack of batteries in the helmet storage space under the seats to accomplish this. Hit the link if you want to read more and order one for yourself. Link