In this July 28, 2011 photo, University of Iceland Ph.D. candidate Iwona Galeczka conducts indoor experiments simulating the CarbFix test planned to begin in September, in Reykjavik, Iceland. CarbFix scientists, at a nearby geothermal plant, will separate carbon dioxide from a volcanic field's steam and pump it underground to react with porous basalt rock, forming limestone, to see how well the gas most responsible for global warming can be locked away in harmless form. Galeczka's key equipment, a plug flow reactor, is the vertical object on the right. (AP Photo/Brennan Linsley)

Associated Press
In this July 28, 2011 photo, University of Iceland Ph.D. candidate Iwona Galeczka conducts indoor experiments simulating the CarbFix test planned to begin in September, in Reykjavik, Iceland. CarbFix scientists, at a nearby geothermal plant, will separate carbon dioxide from a volcanic field's steam and pump it underground to react with porous basalt rock, forming limestone, to see how well the gas most responsible for global warming can be locked away in harmless form. Galeczka's key equipment, a plug flow reactor, is the vertical object on the right. (AP Photo/Brennan Linsley)
In this July 28, 2011 photo, University of Iceland Ph.D. candidate Iwona Galeczka conducts indoor experiments simulating the CarbFix test planned to begin in September, in Reykjavik, Iceland. CarbFix scientists, at a nearby geothermal plant, will separate carbon dioxide from a volcanic field's steam and pump it underground to react with porous basalt rock, forming limestone, to see how well the gas most responsible for global warming can be locked away in harmless form. Galeczka's key equipment, a plug flow reactor, is the vertical object on the right. (AP Photo/Brennan Linsley)
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