<http://schema.org/description>
"Many biofuels raise a gnawing question: Is it better to make a given grain, legume or other edible plant into fuel, or should we protect it as a source of food?"^^<http://www.w3.org/2001/XMLSchema#string>
<http://auto.howstuffworks.com/fuel-efficiency/biofuels/food-or-fuel-quiz9.htm>