blacklab said:T The laws of thermodynamics(I think) say it is impossible to extract energy from a material without destroying that material! Energy within a closed system cannot be created or destroyed, only converted. Corn is just another vehicle for the net amount of energy available on Earth. How about solar power? The sun is free!
I'm not saying that solar is the end all solution, but it seems even partial utilization would lighten the burden on our constrained resources.
A little clarification. Corn is partial solar power. The carbon supply is limited and does operate in a closed cycle, but the energy used to change it's form comes from the sun. All of the fossil fuels were initially created with plant based solar energy. As energy is converted from one form to another, some of the energy is lost (order to disorder - or why rooms never clean themselves). Plants actually do take disorder (CO2 + water) and convert it into order (sugar), but it takes the energy of the sun. Without plants and the input of energy from the sun the world would run out of energy. NO plants, NO life.