stupid |ˈst(y)o͞opid| adjective
lacking intelligence or common sense:

The United States consumes about 70 billion barrels of oil per year.

The heavily government-subsidized industry of farming corn to produce ethanol for liquid fuel is currently using more than HALF of the corn produced annually in the U.S. to produce approximately 1 billion barrels per year. And each barrel of ethanol contains less energy equivalent than a barrel of petroleum.

So half of our annual production of corn, itself an extraordinarily petroleum-use-intensive crop, instead of being eaten for food, is being used to produce less than 1/70th of our annual consumption of oil energy.

I’ll leave it as an exercise for the reader to determine why exactly we are doing this. Hint: “government-subsidized” is a good place to start.