FORTUNE -- What if scientists could transform coal-fired power plants from giant carbon dioxide emitters into giant carbon sinks? Some say that they can, and will. Graciela Chichilnisky, a founder of Global Thermostat, admits it's hard to believe: "The more energy the less the emissions—it's mind boggling."
Global Thermostat and at least two competitors say they can pull carbon dioxide straight from the air, potentially at costs low enough to solve global warming and provide an infinite source of gas by using the CO2 to feed algae. Chichilnisky summarizes her company's business model this way: "Take CO2 from the air and turn it into cash." More
Green industries of the 21st century could spring from unlikely sources -- just ask software billionaire Tom Siebel.
FORTUNE -- Bright ideas about how to help the environment and in the process make a few bucks -- or perhaps even a few billion bucks -- abound. But which of them could actually work?
Might it be billionaire Tom Siebel's new venture, the mysteriously-named C3, which aims to use clever software to radically improve MOREScott Woolley - Apr 4, 2011 10:20 AM ET
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