clean coal

At first glance, it doesn't appear to be much different from Bush the Younger's:

With the climate legislation stalled in Congress, however, many of Obama's allies find themselves divided by the president's push for new offshore drilling, his budget's tripling of loan guarantees for nuclear power plants, and his repeated use of the phrase "clean coal," which the coal industry uses as shorthand for still unproven and uneconomic technologies that could limit carbon-dioxide emissions from coal-burning power plants.