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 excess pounds off of a vehicle without sacrificing structural integrity. It's easier to work with too, and can be shaped and cut without being heated. The size of GM's contribution to the cause hasn't been disclosed, but NanoSteel CEO Dave Paratore seems encouraged by the partnership, stating that it will allow them to "accelerate the final phases of development" for its nano-structured AHSS. Maybe together, the two firms can meet President Obama's 2025 mileage goal. Read on for the official press release.