Scientists and delegates from nearly 200 nations continue their work in Copenhagen, wrestling with how to cut carbon emissions and slow global warming. Many are banking on an experimental technology called "carbon capture" -- taking carbon emitted by industrial activity and pumping it back into the ground. In the second part of our series on carbon sequestration, we look at the technology's promise -- and pitfalls. Reporter: Lauren Sommer
Learn more about how carbon capture would work. View slideshow
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