Here's a self-serving op-ed

The Aluminum Association tells us, courtesy of the Detroit News, that if we maintain size while decreasing weight (presumably by using their product), we can make a car that gets better mileage without sacrificing safety.

Oh, and what did they forget to tell you? Oh, yeah, your Ford Focus would cost a cool fifty grand if they took the Aluminum Association's advice to heart and made an all-aluminium vehicle. But wait--it gets better! Aluminium is one of the most difficult metals to refine, requiring a LOT of energy to coax it from bauxite. Given that there are no more free-flowing Columbia Rivers to dam and generate hydroelectric power, the power necessary to make the aluminium for the car would require a lot of coal fired power plants.

In short, the "environmental" 50mpg car could end up being a net environmental loss. Ouch.