Venture capital investment in clean technology grew 10% from the second quarter to the third this year. According to a report by the Cleantech Group and Deloitte, 134 companies received investments of $1.59 billion – up from $1.2 billion in the second quarter. The sector's upward trajectory continues, with last quarter marking the second in a row of double-digit growth. In the first quarter of 2009, venture capital investment in cleantech companies hit a low of $1 billion.

The strong third quarter has made the cleantech sector the largest in the venture capital business, according to the Cleantech Group, pulling ahead of biotech. Twenty-seven percent of venture capital funds invested in the second quarter of 2009 went to cleantech companies – up from 3% at the beginning of 2004.

Trina Solar (NYSE: TSL), a maker of solar photovoltaic products and a colleague of Suntech Power Holdings (NYSE: STP), issued second-quarter results on Monday after the market closed. According to Reuters, Trina Solar beat market expectations.

Revenues decreased over 26% year-over-year (according to the actual press release, revenues increased over 13% on a sequential basis). Net income was 71 cents per American depositary share (ADS). Analysts were betting on 37 cents per ADS being the likely profit figure.

We're still in the early stages of this trend, but it's pretty clear that the green energy sector is fast becoming a venture capital darling. Today, for example, five deals were announced in one publication alone (three VC, two acquisitions). The three investments account for $47.4 million in VC investment. And only yesterday, Solazyme picked up another $57 million in its Series C round.

In what remains a capital-constrained market, the cash is still flowing. In the private equity space, investments in clean technologies have remained steady from 2007 to 2008, despite broader economic calamity. Such commitment this early in the game may hint at what the next bubble will be.

How will President Obama's $825 billion plan to stimulate the economy work? It looks like it will create jobs for the people working on the projects. But how long will those jobs last and will they continue after the projects are over? And if there's something wrong with his plan, what would be a better alternative? I think that if these projects are investments that create revenue generating operations, they are worth doing -- especially if those revenues ultimately recoup the investment.

Here are some of the specific plan elements that I view as investments:

• Boost renewable energy supply. The plan seeks to double renewable energy generating capacity of over three years -- to power six million American homes. It would upgrade two million homes and 75% of all federal buildings to better protect against the heat and cold -- saving low-income homeowners $350 a year in utility costs and cutting government costs by $2 billion a year. It would also provide loan guarantees to boost the $100 billion in private sector investment in clean energy projects over three years.
• Upgrade 3,000 miles of transmission lines for a national electric grid to make more efficient use of energy.
• Build 1,300 waste-water projects which would provide an ongoing revenue source for cities and states and reduce the costs of cleaning up polluted water.

Here's is my quick form strategy for investing during an Obama presidency:

Health care stocks should perform well under an Obama administration. It has been made clear that within the next four years our healthcare system shall be taking on a radical new form. There is certain to be a massive infusion of new money into the sector. I would hasten to clarify that pharmaceutical stocks might not be the angle that you want to play here. I would lean more towards hospitals and long-term care providers. Check out this analysis from Kiplinger, to get yourself started.

Next, I'd be looking at infrastructure plays. I'd focus on materials, procurement, and construction, as they relate to roads, tunnels and bridges. This play will be more dangerous in the near term, as these types of expenditures will be more dependent on governmental budgetary processes, rather than executive edict. Jim Cramer recently offered some input about infrastructure. You might want to check out his suggestions. Then, you can find information about building an infrastructure position at TheStreet.com. Additionally, here's a great list of infrastructure companies which has been provided by Seeking Alpha.

To me, perhaps the most important investment angle to play through the next administration will be alternative energy stocks. I expect that there will be a great deal of money moving in there. Ethanol is said to be a sure thing. I myself am not so positive about that. Oh, we can be sure that there will be plenty of ethanol to go around. However, I don't see much financial return in it at the investor's level. I lean towards solar plays, and to a lesser degree, I like wind power. You can get a good feel for alternative energy direction by reviewing The Pickens Plan. There is no shortage of companies to invest in if you're looking for alternative energy plays. You can easily start your stock picking hunt by checking out the companies which are included in the Wilderhill Clean Energy Index.

As always, stock portfolio success begins with good research. Hopefully, I've given you some quality leads to get started with. When all is said and done, history clearly shows that the markets flourish under administrations controlled by the democrats. Let's hope to God that this time around won't be the exception.

"Oil is setting the stage for a big rally in alternative energy," says Eric Roseman, resources expert and editor of Commodity Trend Alert. Here's a look at two stocks poised to benefit from this trend.

"A surging oil price is extremely bullish for alternative energy. Over the last 12 months, as oil prices have doubled, uranium and solar energy stocks have crashed.

"These sectors have declined because sub-prime has taken everything to the basement until recently - not because solar energy or uranium are flawed investment themes.

"That's why we've recently placed new trades on Suntech Power Holdings (NYSE: STP) and Cameco (NYSE: CCJ). There's no way high oil prices won't encourage more interest in these distressed sectors.

Within the next three years, the federal government is expected to enact legislation capping carbon output levels for U.S. businesses. U.S. companies will either have to reduce their greenhouse gas emissions by a certain percentage, to be determined later, or buy carbon offset credits from businesses that have reduced their carbon output in excess of their required minimum. Why is this a problem for investors? Once the federal carbon caps are in place, carbon offset credits will be much more expensive to purchase. Companies with excessive carbon outputs will pay a steep price for carbon credits.

Why don't companies take a more proactive approach and purchase carbon offset credits now when the price is much lower? Unfortunately, the carbon credit market is presently completely unregulated. There is no standardized system for measuring carbon reduction amounts nor is there any way to verify the legitimacy of such carbon credits as do exist. Companies that wish to market themselves as "green" may voluntarily participate in various carbon reduction efforts, such as reforestation projects. But there is no guarantee that the federal carbon cap program will recognize those efforts once mandatory caps are in place.

Many of the same problems exist with Renewable Energy Certificates (REC). There is no national registry of who owns what RECs, no verification as to whether the energy is actually generated from clean energy sources. There is no standardized method to convert RECs into carbon offset credits. In the next 3-4 years, all investors in all types of companies will be forced to consider carbon output numbers as one more factor in the due diligence process.

The Israeli Cabinet is set to vote today on a radical initiative set forth by Shai Agassi, the demigod-hero of many Israeli entrepreneurs, to revolutionize the Israeli transportation infrastructure. The proposal calls for the creation of "an entire electrically powered system for cars, starting with solar energy, non-polluting electric vehicles and infrastructure to charge the cars -- all without dependence on oil."

Agassi's meteoric rise from the halls of the Israeli-M.I.T., Technion University, to the board rooms of global software conglomerate, SAP (NYSE: SAP), has been an inspirational story to a country chock-full of entrepreneurs. Agassi founded TopTier Software (originally called Quicksoft Development) in Israel in 1992. SAP acquired Agassi's company in April 2001 and Agassi was tapped for responsibility over the strategy of the Enterprise Resource Planning (ERP) software leader. Agassi recently left SAP to strike out on his own.

According to the Ha'aretz article, the cabinet's blessing will mean tax breaks, among other positives. Purchase tax on standard gasoline and diesel vehicles is 84%, which will drop to 79% on January 1. For more environmentally friendly hybrids the rate is only 30%, according to the article.

Despite a seemingly unanimous support for environmental matters from the Democratic party, there are still divisions inside the party on how to go forward. According to a Wall Street Journal article [subscription required], the sharpest inter-party divisions exist on the issue of fuel-economy standards.

Interestingly, it seems like everyone in the party agrees fuel-economy standards need to be increased, the issue is when and how fast. Automakers, especially U.S.-based, would stand to suffer if fuel-economy standards are quickly increased for obvious reasons such as making it more costly to produce cars -- a factor that American automakers would probably prefer not to deal with in their current situations.

Fuel-economy standards are certainly not the only issue at hand. Last week, House speaker Nancy Pelosi agreed to mandating utilities to begin using more renewable fuels. And like I covered in this post, I think the ethanol mandate is going to be increased in the next environmental bill.

All this being said, I think the most interesting way to play the environmental boom in America is through a basket of stocks. One specific stock I like for the environmental bill is Pacific Ethanol Inc (NASDAQ: PEIX), a thesis I covered here.

If you don't have time to do research on all the different companies in this interesting sector, I really like the Powershares Clean Energy ETF (AMEX: PBW). This is basically an index of clean companies which serves to reduce the risks in entering this volatile and speculative sector. Although the expense ratio is rather high at .60%, it's the best option for investors not willing to spend too much time on this sector.

With the price of fuel growing each week, the search for America's next energy alternative grows even stronger. WR Hambrecht looked at Clean Energy Fuels (NASDAQ: CLNE), a California-based supplier of liquid & natural gas for vehicles, and they think they found a hidden gem.

Clean Energy provides solutions for fleets to run on natural gas as an alternative to gasoline or diesel. The company currently operates in 10 states and Canada, with plans to begin operation in Peru later this year. The first quarter of 2007 was the company's first profitable quarter since 2001, generating revenues by selling compressed natural gas, liquid natural gas, and to a lesser extent, by building, operating and maintaining fueling stations. They currently serve over 200 commercial fleets with 13,000 natural gas vehicles, including Waste Management Inc (NYSE: WMI), Enterprise Rent-a-Car, UPS Inc's (NYSE: UPS) fleet in Dallas and the Port of Los Angeles.

The key to Clean Energy's success lies in the continued increase in crude prices and the public's desire for cheaper alternatives. According to Hambrecht, natural gas vehicles emit "50-70% fewer emissions, save $5,000-$17,000 in fuel costs annually and use widely distributed and domestically available natural gas" compared to the standard vehicles used to day.

Not a bad start.

Clean Energy is currently in its growth phase and Hambrecht initiated coverage of the alternative energy stock with a Buy rating and an $18 target. They project the company to earn $0.03 in 2007 and $0.23 in 2008. Hambrecht believes Clean Energy's valuation, currently up $0.12 to $13.00 in mid-day trading, doesn't take into account the upside potential from the natural gas vehicle roll-out and estimates an addressable market over $20 billion.

With gas prices rising so fast, there's no reason natural gas should not be outfitted for commercial vehicles, but for the general populace as well.