Think back a couple of years, when corn was being touted as a "renewable energy source" and its plentiful supply would solve our energy problems forever. What happened?

Now flash forward to this summer, when corn fields have been ruined because of global warming (which, of course, doesn’t really exist).

Suppose that we had gone full scale into corn-as-fuel production—what would this year’s weather have done to fuel prices? Would we be needing to ration gas supply?

The underlying question: is there really a viable, dependable substitute for oil at this time?