This year was an important one for Clean Energy Fuels (CLNE 1.54%), as the company continued to grow, making important progress as it works to disrupt the world of transportation fuels. In this video, Fool.com contributor Aimee Duffy talks to Tyler Crowe about the important year that Clean Energy had, including signing a big deal with UPS (UPS 3.46%) and growing in China. Ultimately, Aimee thinks the company's contribution to American energy independence is more than enough to put it on her year-end list of favorite energy stocks.