Sen. John Kerry (D-MA) has introduced legislation that would ban the construction of new coal-fired power plants that are not capable of capturing and storing carbon dioxide. The "Clean Coal Act" would address the 150 proposed coal-fired plants in the U.S. Of those, only a little over a dozen would have carbon sequestration technology. Kerry said, "Unless we can build clean power plants, we should not be building them." Kerry acknowledged that this plan would be linked to tax credit legislation to assist carbon capture technologies. One of the biggest challenges regarding carbon capture and sequestration is having the technology ready when the carbon cap is implemented.