"Ultracapacitors are lighter and more powerful than batteries, 10 times more powerful by size as well as 10 times lighter," notes Brendan Coffey.

The editor of Cabot Green Investor explains, "Within this market, Maxwell Technologies (MXWL) is a San Diego-based company whose patent-protected ultracapacitors are denser -- and therefore able to hold more energy -- than those of its competitors.

"In a simplified comparison of how powerful and quick Maxwell's ultracaps are, a lead acid battery takes 10 hours to fully charge. A lithium ion battery will charge in about an hour.

This post is one in a series in which more than 60 newsletter advisors share their Top Stock Picks for 2011. This special report is courtesy of TheStockAdvisors.com.

"Zero emissions is the holy grail of green technology as the world looks to grapple with the converging pressures of tight fossil fuel supplies, air quality issues and global warming," says Brendan Coffey.

The editor of Cabot Green Investor explains, "I see the push for zero emissions reviving a technology once largely written off: nuclear power. In light of this, my top pick for 2011 is Uranium Resources (URRE).

"Cameco (CCJ) is a Canadian miner and the second largest producer of uranium in the world," says Brendan Coffey.

The editor of the Cabot Green Investor explains, "However, the company is more than just a uranium miner. It also operates further up the nuclear supply chain, and has a goal of continuing to expand its related services.

"The company delivered 16% of world demand in 2009 and is aiming to double production by 2018. It has 'proven and probable' uranium reserves of 480 million pounds, enough to meet nearly three years of current global demand.

"In my view, Corning (GLW) shares are exceptionally cheap at a mere nine times current year and 2011 earnings," says environmentally-aware investing expert Brendan Coffey.

The editor of Cabot Green Investor explains, "Primarily, we're excited by the emergence of a technology invented in 1962 that languished without an appropriate market for 45 years until 2007: Gorilla glass.

"The clean up from the BP oil spill will be involved, costly and very long; one company involved is Clean Harbors (CLH), which is the market share leader in hazardous waste services and a leader in overall environmental remediation," says Brendan Coffey, a specialist in "green" investing.

The editor of Cabot Green Investor explains, "Given the scope of the Deepwater Horizon well disaster and the established reputation of Clean Harbors, we suspect the company will benefit for months if not years to come.

"Clean Harbors is a well-run company that was founded by current CEO Alan Kim in 1980 as a four-man outfit dedicated to cleaning out oil tanks. Last month, the company sent a phalanx of employees to begin cleanup efforts in the Gulf.

"New York-based Veeco (VECO) is one of three major providers worldwide of specialized equipment to the LED and solar industries, along with other instruments for measuring on a nano-scale level, in the pharmaceutical, data storage and materials science fields," notes Brendan Coffey.

The editor of The Cabot Green Investor explains, "The company has been involved in thin-film deposition for 30 years and has amassed a portfolio of 300 intellectual patents that help maintain at least something of a wall against competitors."

This post is part of a special report, Top Picks for 2010, the 27th annual survey in which TheStockAdvisors.com asks the nation's leading advisors for their single favorite stock for the new year. See all 80 stocks listed here.

Brendan Coffey is the editor of The Cabot Green Investor, a newsletter focused on companies involved in various aspects of the broad environmental technologies sector.

For his top pick for 2010, he looks to SmartHeat (HEAT), a maker of plate-heat exchange systems and heat meters.

"A smart grid is one of the holy grails of 'green' technology, enabling utilities to deliver resources when and where they're needed and reduce resources when they're not," says Brendan Coffey.

In The Cabot Green Investor, he explains, "There are larger companies in the smart metering arena, but Echelon (NASDAQ: ELON) has posted some significant wins in the marketplace recently and appears primed to generate more."

"Right now, grids are set up to provide as much power as needed at peak times, all the time. Studies show that when customers are part of a smart grid, and have more information to reduce energy usage, demand is slashed by up to 50%, particularly in areas where rates are discounted depending on the time of day.

Brendan Coffey is a specialist on "green" investing; in his The Cabot Green Investor, he looks to alternative energy firm American Superconductor (NASDAQ: AMSC).

Here's his review of the company, which is a player both in wind power and energy efficient wiring that can play a role in improved power grid systems.

"Long an R&D company, focusing on highly conductive wiring, American Superconductor made a game-changing purchase of an Austrian wind company, Windtec, in early 2007.

This post is part of a special annual report -- Top Stock Picks '09 -- in which TheStockAdvisors.com asked 75 leading newsletter advisors to select their favorite investment for the new year.

"As the government and corporations look to get more environmentally sound, they'll be turning to Tetra Tech (NASDAQ: TTEK), an environmental consulting company," suggests 'green technology' specialist Brendan Coffey.

The editor of The Cabot Green Investor explains, "Tetra Tech is the expert people turn to the figure out the nitty gritty of getting eco-projects done." Here's his review of the stock, which he selects as his favorite investment idea for the coming year.

"President-elect Obama looking to resuscitate the economy, wants to do two things at once: immediate stimulate job growth with an aid package of perhaps $700 billion while laying the groundwork for the country's long-term economy health.

"He's identified the core of that dual strategy as going green -- to wean us off oil, counteract the eventual dire effects of global warming and make the country the technological leader in alternative energy, creating five million or more jobs in the process.