Prepare yourself, because few topics spark as fiery a debate as the one we're going to discuss today.

What's your take?
In just a second, you can tell all of us exactly how yousee things playing out. You can even rant about our government until you're blue (or red) in the face.

But first, a few points.

When President Obama signed the American Recovery and Reinvestment Act of 2009 into law, nearly $79 billionwas set aside for renewable energy. Politics aside, that's an awful lot of money. And it may just be the beginning.

Don't forget, Obama pledged to "help create 5 million new jobs by strategically investing $150 billion over the next 10 years" and to "ensure 10% of our electricity comes from renewable sources by 2012, and 25% by 2025."

Fuzzy math?
According to Management Information Services, a Washington, D.C.-based economic research firm, between 1950 and 2003, U.S. federal government subsidies for renewable energy were approximately $111 billion -- meaning Obama is going to invest more in one decade than we previously had in more than half a century.

This looks like a major win for green energy -- and could benefit everything from obscure companies involved in green energy, like KLA-Tencor (Nasdaq: KLAC) and Lam  Research (Nasdaq: LRCX), to major tech companies getting involved in smart grid technologies, like Google (Nasdaq: GOOG) and Cisco (Nasdaq: CSCO). But, still, it pays to dig a little deeper.

When you do, you discover -- among other things -- that according to the Department of Energy, renewable sources accounted for 9% of electricity generation in 2008. That means Obama has three years to move the dial just 1 percentage point.

Pot, kettle, black
Earlier this year, an article in The Huffington Post called out a similar discrepancy in Obama's rhetoric: "If this is how the impressive sounding goal of 'doubling alternative energy' is calculated, what Obama is essentially pledging is to simply maintain business-as-usual growth."

Combine this with the fact that oil prices have been cut in half, and that even wind super-evangelist T. Boone Pickens now says the U.S. doesn't have the infrastructure needed to get clean energy to market, and you begin to realize why some people aren't jumping on the alternative-energy bandwagon.

5 words that will knock you off the fence
I admit, I love the ideaof a stiff breeze charging my iPhone and a sunny afternoon lighting up Manhattan at night. But when it comes to green investing, I've been a bit of a skeptic lately. That is, until I opened The Wall Street Journallast month and saw this line:

"The money is coming back."

That's according to Ethan Zindler, head of North American research at New Energy Finance Ltd .And frankly, it's a bit of an understatement.

After all, Morgan Stanley and Citigroup each took advantage of new federal incentives to invest more than $100 million in wind farms in August alone.Meanwhile, Spanish Iberdrola is throwing around cash-grant numbers in the $500 million range and is planning on investing another $2 billion.

And now even GE is getting back into the game. It tells The Wall Street Journal, "We see opportunities and are pursuing them actively."

So are we -- and so can you
There are plenty of ways to play the clean-energy craze -- such as buying shares of SunPower (Nasdaq: SPWRA) or Cree (Nasdaq: CREE). But our Motley Fool Hidden Gems team is busy uncovering less obvious -- and potentially much more profitable-- opportunities.

Primarily, it's looking for small, ignored, or overlooked companieswith explosive growth potential. One that fits the bill is Jinpan International . Although lesser-known than other Chinese companies like Trina Solar (NYSE: TSL),   this company makes cast-resin transformers, which require only a fraction of the upkeep of their oil-based predecessors.

And because many wind farms are being built in desolate, hostile environments -- including some hundreds of miles offshore -- they're in very high demand.

In fact, over the past two years, Jinpan's wind products have gone from accounting for less than 1% of revenue to more than 13% -- and over the past five years, the top line has had an impressive 30% compound annual growth rate. Here are a few more favorable metrics.

Company

Insider Ownership

Sales Growth*

EPS Growth*

Net Margin*

ROE* Continued...