Georgia’s Plant Scherer is the country’s largest emitter of CO2. Associated Press Are the new federal limits on greenhouse-gas emissions going to cost a lot, as critics say, or a little, as the Environmental Protection Agency asserts? That depends on whether you think Americans are going to use more electricity in coming years or cut way back. The EPA assumes electricity consumption will drop sharply. That plays a significant role in the agency’s calculation of the cost of complying with new rules to slash the carbon emissions from the utility industry. The industry accounts for about a third of all U.S. emissions, most of it from burning coal. The agency forecasts that the effort to cut those emissions by 30% from their 2005 level will cost utilities and their customers $8.8 billion a year in 2030. That is less than the cost of other recent EPA rules, such as […]