When you look at Clean Energy Fuels Corp. (NASDAQ: CLNE ) today, it's easy to forget just how the stock once behaved. In early 2021, it was part of the "green energy" excitement that pushed a lot of small-cap clean fuel names Analyst's Disclosure:I/we have no stock, option or similar derivative position in any of the companies mentioned, and no plans to initiate any such positions within the next 72 hours. I wrote this article myself, and it expresses my own opinions. I am not receiving compensation for it ...