Based on the aggregated intelligence of 180,000-plus investors participating in Motley Fool CAPS, the Fool's free investing community, alternative-fuel provider Clean Energy Fuels (Nasdaq: CLNE) has earned a respected four-star ranking.

With that in mind, let's take a closer look at Clean Energy's business and see what CAPS investors are saying about the stock right now.

Clean Energy facts

Headquarters (founded) Seal Beach, Calif. (2001)
Market Cap $1.4 billion
Industry Oil and gas refining and marketing
Trailing-12-Month Revenue $301.0 million
Management Co-Founder/CEO Andrew Littlefair
CFO Richard Wheeler
Return on Equity (average, past 3 years) (10.8%)
Cash/Debt $228.6 million / $285.8 million
Competitors Atlas Copco
AB
Exterran Holdings

Sources: S&P Capital IQ and Motley Fool CAPS.

On CAPS, 97% of the 1,544 members who have rated Clean Energy believe the stock will outperform the S&P 500 going forward.

A couple of months ago, one of those bulls, FinerPoints, touched on the tailwinds working in Clean Energy's favor:

Waste Management fleet has already started their transition over as a result of the economical benefits. I'm certain that the trucking industry will follow suit. Corporate America loves the smell of profits in the morning! The growth story? When natural has use finally gets to Main St. -- our cars and possibly homes. Usually great growth stories start out B2B (commercial) & then filters into daily life. ...

Sooner or later, America can reap the benefits financially by contributing to a healthier environment.

If you want market-beating returns, you need to put together the best portfolio you can. Owning exceptional stocks is a surefire way to secure your financial future. Of course, despite its four-star rating, Clean Energy may not be your top choice.

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Fool contributor Brian Pacampara owns no position in any of the companies mentioned. Motley Fool newsletter services have recommended buying shares of Clean Energy and Waste Management, as well as creating a write covered strangle position in Waste Management. The Fool owns shares of Waste Management. Try any of our Foolish newsletter services free for 30 days.

We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Fool's disclosure policy always gets a perfect score.