Prius to save the world's resources?

I came across a small blurb in a DR's waiting room magazine. According to this ( a list of gas hogs-over consumers) 1/4 of all fuel consumed is used by vehicles going no where. Cars warming up, cars in highway bottlenecks, cars left running while the driver does just a few errands, truckers who must or choose to leave their vehicles running while loading, unloading, or in for dinner, etc. etc. Add to that those recreational vehicles which are horribly wasteful, there goes the fuel resources. Since my Pri shuts down at lights, etc. I feel really good that I'm not consuming part of that 1/4 wasted fuel. Today I coasted into town (downhill) and smiled at the 99mpg, even though I know it isn't anywhere near the whole picture. Personally, I wouldn't mind seeing gas reach 10.00 gallon except it would mean government cronies are getting richer.