In Texas, the largest oil producer in the United States, the demand for carbon dioxide is soaring, because it can help squeeze oil out of formations deep in the earth. That's why the idea of of capturing it and pumping it underground is gaining traction in the power sector. It sounds like an exercise in environmental idealism: Take the heat-trapping gas — belched prolifically from coal plants, which generate 45 percent of the nation’s electricity — and bury it, benefiting the atmosphere and combating global climate change. Of course, it is something of an environmental conundrum that stowing the greenhouse gas underground can also help to produce more fossil fuels.
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