. . . "In point of fact, we DO ???eat coal??? and we can ???burn navel oranges in jet plains???. (RTK Rentech has run a bio-jet fuel made from garbage ??? no doubt including some orange peels ??? in military jets.) As just about everything depends on nitrogen fertilizers made from either / any of natural gas, petroleum, or from coal; most of the food we eat is in fact indirectly fossil fueled??? Look up" .