Chevrolet Tahoe- Green car?

From GreenCar.com: Chevrolet Tahoe Hybrid Named 2008 Green Car of the Year®
Should a gigantic SUV ever win “Green Car of the Year”?  It’s not like you’re helping the environment by going out and buying one of these gas guzzling vehicles.  The Chevrolet Tahoe Hybrid gets 20mpg city and 20mpg hwy.  It’s an improvement over the regular Tahoe for city mileage, but not on the highway.  So unless you really need one of these behemoths, just because it’s a “hybrid” doesn’t mean that it’s really green.