<http://schema.org/description>
"When it comes to alternative fuels for cars and trucks, you may think you already know all the options. But do you think you can you list 10 alternative fuels already in use? We can."^^<http://www.w3.org/2001/XMLSchema#string>
<http://auto.howstuffworks.com/fuel-efficiency/hybrid-technology/10-alternative-fuels-on-the-road4.htm>