What's the simplest way to improve fuel efficiency? Build a lighter car, of course. That's GM's plan, at least, and it's taking its first step toward a more efficient future by investing in a nano-structured materials design firm called NanoSteel. "Over the next several years, light-weighting of vehicles will be a major focus area to improve fuel economy." GM's Jon Lauckner said of the deal. The nano-structured Advanced High Strength Steel (AHSS) GM's betting on has the potential to shave ex
