Image Source: Mike Lee Dear Pablo: We're a San Francisco-based cab company and we use hybrids exclusively. In trying to decide between buying Toyota Prius or Ford Fusion cars, some of our company members want the comfort and luxury of the Fusion over the great gas mileage of the Prius. Is the Prius really that much better, in terms of carbon footprint and fuel efficiency, to justify giving up some amenities? Ultimately the answer to this question depends on the values that an individual brings to the decision. We all place different importance on climate protection, economics, and comfort. Ultimately we need to reconcile the quantifiable and the intangible ourselves. First, let us look at the quantifiable; let us figure out the environmental impact of making and operating both vehicles in question. Then we can overlay the question of amenities, public perception and any other qualitative criteria.... Read the full story on TreeHugger