Based on the aggregated intelligence of 135,000-plus investors participating in Motley Fool CAPS, the Fool's free investing community, air pollution control specialist Fuel Tech (NASDAQ:FTEK) has earned a respected four-star ranking.

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

Fuel Tech facts

Headquarters (founded)

Warrenville, Ill. (1987)

Market Cap

$214.9 million

Industry

Environmental and Facilities Services

TTM Revenue

$77.9 million

Management

CEO John Norris, Jr. (since 2006)

CFO John Graham (since 2008)

Return on Equity (average, last five years)

14.9%

Cash/Debt

$11.3 million/$2.2 million

Competitors

Foster Wheeler (NASDAQ:FWLT)

Ashland (NYSE:ASH)

CAPS members bullish on FTEK also bullish on

General Electric (NYSE:GE)

Vale (NYSE:VALE)

CAPS members bearish on FTEK also bearish on

First Solar (NASDAQ:FSLR)

Raser Technologies (NYSE:RZ)

Sources: Capital IQ, a division of Standard & Poor's, and Motley Fool CAPS. TTM = trailing 12 months.

Over on CAPS, fully 1,000 of the 1,032 members who have rated Fuel Tech -- some 97% -- believe the stock will outperform the S&P 500 going forward. These bulls include Money4e and bgpr.

Two weeks ago, Money4e tapped the stock as a refreshingly green way to bet on black:

We have a lot of coal to use and this company has the right stuff to insure companies don't foul the air. With [Fuel Tech's] equipment we can use more of the less clean coal but scrub the exhaust before it is discharged.

In a pitch from late last year, bgpr adds fuel to the Fuel Tech bull case:

We are already using a lot of coal to generate electricity. If we want independence from foreign oil we must continue to burn coal. If we want to be "green" we must burn coal efficiently. [Fuel Tech] has technology and expertise to help us become more efficient. Every month or so they add new utility customers worldwide. They are just starting in China. Growth potential huge as China is also becoming a huge energy importer.

What do you think about Fuel Tech, or any other stock for that matter? Make your voice heard on Motley Fool CAPS today. More than 135,000 investors are waiting to hear what you have to say. CAPS is 100% free, so simply click here to get started.

Fool contributor Brian Pacampara owns no position in any of the companies mentioned. First Solar is a Motley Fool Rule Breakers recommendation. The Fool's disclosure policy always gets a perfect score.