Biofuels would be more feasible if cars got 10-fold the fuel economy
There's a target ---> 500 miles per gallon.
Here's a solution:
Actually the above vehicle achieves significantly better than 500 mpg. Officially it gets more like 1615 mpg.
Seriously, cars can be made any size, it's just peer pressure that keeps people buying bigger and bigger vehicles. This is a genuine photo of traffic in Stanstead, Quebec. Looking carefully, we see four light duty trucks or SUVs, six cars, and five tractor-trailers. Small cars are already a minority in this town:
<img src="http://www.tomifobia.com/galexander/pix/traffic_alexander2.jpg";
What are the chances people will drive an even smaller vehicle when vehicles of different weight classes are vying for road space?