Checking the variability of EPA's math leads some to question its Clean Power Plan
Under the Clean Power Plan -- U.S. EPA's ambitious proposal to curb greenhouse gas emissions from existing power plants -- states are asked to meet widely divergent targets. Some, like North Dakota and Kentucky, would have to cut carbon intensity by less than 20 percent; others would have to hit reduction targets of more than 40 percent. Given the number of factors at play in determining each state's carbon intensity rate, the formula used by EPA is understandably complex. Over the past month and a half, state agencies have been working their way through it in order to recreate the agency's findings, and while most have found the basic formula to be sound, some are hesitating to endorse the logic behind it.