Clean Energy Fuels (NASDAQ:CLNE) showed strong growth in fuel deliveries last quarter. As we approach earnings again, Motley Fool contributor Jason Hall has four key things that he's looking for. In the video below, he gives insight into all of these things, including what to make of competition from Integrys Energy Group (UNKNOWN:TEG.DL) and Questar Corporation (NYSE:STR) subsidiaries Trillium CNG and Questar Fueling. 

Seeing a move toward profits for this fast grower is important, and all four of the points discussed are tied to Clean Energy's ability to get there. For more, check out the short video below.