Is carbon capture a green technology?

Or just a front for big oil and coal?

The other day I read an interesting article about a new program that is developing in Europe. Coal-powered utilities, under the plan, would capture their CO2 emissions and pump them deep under ground - virtually eliminating all CO2 emissions.

Some, however, wonder if that carbon will stay underground.

One potential fix is storing that carbon in peridotite, one of the main rocks in the upper mantle of the Earth's crust. Still, even under perfect conditions, peridotite couldn't eat all of the world's CO2 emissions.

Is carbon capture a legitimate, green idea that should be explored, or is it just an excuse to prevent real change for as long as possible.