Dear Editor:Exactly how willing is this nation to literally feed itself on oil?Would-be conservationists singing the praises of biodiesel need to take in a bigger picture of sorts. Most all of the United States’ stock of ethanol and biodiesel is derived from our grain and corn supply. This year, one-sixth of that supply went into the production and distilling of ethanol. While only actually providing for about 3 percent of our nation’s automotive fuel, this misuse of our food supply sends economic shock waves through other countries dependent on America’s food exports (70 percent of the entire world’s).Those millions upon millions of tons of grain being annually pumped into gas tanks nationwide will also have a crippling effect on livestock, as well as other interwoven industries, in years to come where ethanol and biodiesel production are expected to increase exponentially due to their amazing potential for huge profits.I’d say that biodiesel advocates would do well to acquire a taste for crude. And that is open to interpretation in at least two ways.Gordon WestEl Jebel