As our forests, oil, and other energy sources decrease, corn is replenished annually, and is a never-ending energy source. Corn is friendly to the environment. It contributes oxygen to the atmosphere while growing and poses no safety or pollution hazards.
Corn is in abundant supply and is universally available.
It's easy to envision corn as the energy source of the future. Wood pellets can also be used, but corn and wheat work the best because there is more heat energy in grain. The sun makes grain grow so we are truly using the energy of the sun for our fuel. It takes 4 million years to create oil, gas and coal. It takes 40 years to grow mature trees.