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.