I don't know much about oil extraction technologies but any technology that promises to reduce the cost of extraction, allow for more oil recovery AND reduce total carbon dioxide sounds like a win-win-win-win-win-...-win to me--sorry, got carried away.
An experimental project in Canada to inject carbon dioxide into oil fields has proven successful, removing 5 million tons of the heat-trapping "greenhouse" gas, while enhancing oil recovery, the Energy Department said Tuesday.
If the methodology could be applied worldwide, from one-third to one-half of the carbon dioxide emissions that go into the atmosphere could be eliminated over the next century and billions of barrels of additional oil could be recovered, the department said.
What's the downside (I'm sure there is one)?