David Jones, CEO, Euro RSCG (Age: 41)
Christopher Barger, Director of Global Communications Technology, GM
Matt Kistler, Senior Vice President of Sustainability, Wal-Mart (Age 42)
Maybe you've heard? The planet is dying. No need to worryExxonMobil is on the case. Yespraise the Lordfaster than you can say "Valdez," the company once described as "the earth's No. 1 global-warming villain" has embraced the environmental movement. As has General Motors. And even Wal-Mart. "We want greener products from greener companiesbut there's plenty of green smoke," says Scot Case, vice president of the environmental marketing firm TerraChoice. "Car companies sell themselves as green if they have one or two models with good mileage. They can't become green overnight." Tell that to Christopher Barger, who created a chat site so that GM could communicate with consumers about projects like its electric car. One caveat: Ripping the Escalade and Hummer too strongly is verboten, as environmentalists learned when GM blocked their comments. Under Matt Kistler, Wal-Mart has seen sales of extended-life lightbulbs and paper products skyrocket, no doubt making the Walton family believers in the healing power of greenwashing. And why not? If the Valdez's hull breached today, David Jonesthe ad exec behind ExxonMobil's "Taking on the World's Toughest Energy Challenges" spotmight tell us an 11-million-gallon spill was a giant step toward reducing carbon emissions.