"Now is the ideal time to pick up shares of high-quality European companies; not only are valuations attractive at these levels, but earnings could also surprise to the upside in an environment where global growth remains strong," says international specialist Yiannis Mostrous.

The contributing editor to Personal Finance explains, "Once such top European bargain is water and waste-management firm Veolia Environement (VE).

"Europe accounted for three-quarters of Veolia's revenues in 2009, with France accounting for roughly half that total. But the company's main business lines have relatively light exposure to economic cyclicality and may benefit from European austerity.

"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.

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.

"Our top pick for 2010 is engineering and construction (E&C) firm AECOM Technology (ACM)," says Geoffrey Seiler.

In his BullMarket.com the advisor explains, "AECOM, unlike some better-known E&C names, offers a relatively low-risk business model. It performs no construction work at all and thus has none of the lump-sum, fixed-rate contracts that other companies might sign."

"Water, one of the most precious of resources, continues to be the most mispriced," says Neil George.

In his Profits Hidden in the News advisory, he explains, "Millions of Americans are drinking dangerous water from the tap." Here, he looks at two ways to profit as this situation gains attention.

"The US Environmental Protection Agency has recently updated its data on US municipal water and, as with previous surveys and reports - the news is not good. In fact, for wide swaths of the US population - including those in the nation's capital - its flat out scary.

"A smart grid makes use of coded signals that travel along power lines, much like DSL broadband messages move through the phone telephone," explains growth stock expert Jim Powell.

In Global Changes & Opportunities Report, he looks at two favorite plays on the development of a smart grid: Esco Technologies (NYSE: ESE) and Quanta Services (NYSE: PWR).

"In a smart grid, the signals allow electric meters to report power consumption automatically to suppliers. At the same time, signals can be sent to customer's appliances such as freezers and refrigerators to prevent them from cycling on and off at the same time.

"Clean Harbors (NYSE: CLH), the nation's largest hazardous waste firm, represents a great way to add some recession-resistance to your portfolio," says growth stock expert David Fessler.

The contributing editor to The Oxford Club adds, "This stock is also a way to get paid from cleaning up our nation's biggest environmental messes in the process." Here's the advisor's review.

"Clean Harbors is a one-stop clean-up shop for waste. We're talking hazardous waste, toxic chemicals, radioactive materials and biologic or infectious waste.

"With a superior portfolio of over 100 waste management facilities, Clean Harbors is North America's largest vertically integrated environmental services and hazardous waste-treatment company.

This post is part of a special report, A Dozen Ways to Play an Obama Building Boom.

"Stocks in the water sector could soon flood their shareholders with a deluge of profits," says value investor Nathan Slaughter. In his Half -Priced Stocks, he explains, "Even in the 21st century, UNICEF reports that a staggering 1.1 billion in emerging markets still lack access to safe drinking water.

"And here in the U.S., the EPA has said we need to spend $275 billion to replace aging facilities -- including 800,000 miles of leaky, corroded pipeline that haven't been upgraded since the 1800's in some places.

"We see an incredible opportunities for the companies trying to combat the problem, particularly those involved with water distribution pipes, treatment facilities, purification technologies and other critical infrastructure.

"My top play in the sector is Veolia Environnement (NYSE: VE), a global juggernaut with $45 billion in annual revenues, operating on every continent.

"From humble origins supplying water to Parisians over 150 years ago, Veolia has grown to become the world's largest water utility. Today, it provides water and sewerage services to 130 million people in nearly 60 countries worldwide.

Jim Stack is well known for his "safety-first" approach to money management, focusing on a balance between risk and reward. In his InvesTech market Analyst, he notes, "We now see a window of opportunity in Waters (NYSE: WAT).

Here, Bruce Morison, consultant for Stack Financial Management, explains, "In a market overreaction to a weaker-than-expected fourth quarter, an opportunity has been created to invest in this high-quality company at an attractive valuation level.

"The stock dropped 20% when the company reported earnings that were $0.08 shy of the $1.06 estimate that Wall Street was forecasting. The shortfall was primarily a result of a higher-than-expected tax rate for 2007 and weaker sales in Japan.

"The Japan results reflected a change in government regulations for water testing. Our concern over this event is limited given that Japan accounts for less than 10% of the Waters' sales and is not a key growth market for the firm.

"A quick recap of the company ... Waters Corporation is a medium sized company based in Milford, Massachusetts which designs, manufactures, and services high performance liquid chromatography (HPLC) and mass spectrometry (MS) instrument systems.