Michael Graham Richard, Ottawa, Canadahttp://www.treehugger.com/files/2009/09/vw-l1-1-liter-car-concept-170-mpg-diesel-hybrid.php Photo: VW Production Version to be Available in 2013, If All Goes Well... Now that's what we call downsizing. Last year we wrote about the extremely fuel efficient 1-Liter concept car by Volkswagen, but this year...