We know we can build a hell of a lot more economical cars but won't. No incentives to do it.
One of our members is in the process of converting a Vanagon over to run on used vegetable oil. More and more folks are doing this. How long will it be before a company pops up that will produce a system for collecting, filtering and running used vegetable oil in cars that they produce? It's already happening. Search the internet for "used vegetable oil" web sites. It's also within reason to build a home distillery and brew fuel grade alcohol. Until just a few months ago, Volkswagen of Brazil was building a duel fuel Bay Window bus . . . powered by a type 1 air-cooled motor that would run on gas or alcohol fuel.
In the early years of the automotive industry, Rudolph Diesel and Henry Ford were both big proponents of renewable fuel sources. Diesel designed his engine to run on vegetable oil and was devastated when people converted them to petroleum-based fuels. Henry Ford invested in ethanol production, but cheap petroleum fuels killed the idea.
The answers to our problems are out there. They've been out there for over a hundred years. So, are we going to sit around and complain and blame others, or are we gonn'a get busy and fix our own problems? As long as the average consumer will buy big expensive SUVs and pay for the gas to run 'em up and down the road and just stand around and gripe about how our government or some foreign government or some Saudi oil baron or whoever we choose to blame is causing all our problems, the situation will only get worse. As the comic strip character Pogo once said, "We have met the enemy, and he is us."