Filed under: Ethanol, Flex-Fuel, HUMMER 2010 Hummer H3 - Click above for high-res image galleryCan a Hummer be green? The brand that most obviously represents American excess in the minds of environmentalists - though Hummer's vehicles aren't actually any worse than any other large SUV - has seemingly been fighting off its negative stigma since shortly after the introduction of the larger-than-life H2. Part of the brand's hopeful transformation includes giving each model a flex-fuel...