UMaine's clean snowmobile runs on (a lot of) natural gas
 

Take a look at what these mechanical engineering students from the University of Maine say is the only natural gas-powered snowmobile in the US. Why make all these changes to what used to be a stock Arctic Cat XF1100? To compete in the Society of Aut...

http://www.engadget.com/2015/04/22/c...=rss_truncated