MIT researchers: "We have concluded that a 30â€“50% reduction in fuel consumption is feasible over the next 30 years. In the short-term, this will come as a result of improved gasoline and diesel engines and transmissions, gasoline hybrids, and reductions in vehicle weight and drag. If these improvements are achieved, we estimate a $1,500â€“$4,500 increase in vehicle costs. Over the longer term, plug-in hybrids and later still, hydrogen fuel cells may enter the fleet in numbers sufficient to have significant an impact on fuel use and emissions." Sounds like a business opportunity to me. US auto industry, are ya listening?