Obvious too
If their 12 scenarios took a whole 10 mouse-clicks each to create then it wouldn't take them long to work something up where everyone drives Clever Cars (or equivalent) that run on biofuel and get 110+ mpg. Of course not everyone thinks the Clever Car is the solution, but I do. They should have evaluated this type of technology as a fallback in case hybrids or fuel cells fail to materialize. Either that or people just stop driving, but I think the single-seat tilting three-wheeler is much more likely choice of consumers.