Proposed power plant emission cuts: Can US keep the lights on?

…The comment period for this EPA rule, which ends Aug. 8, has therefore become an outlet for a broad range of concerns about electricity affordability and grid reliability. As for the rule specifically, critics say the EPA’s modeling has overestimated the potential for emissions reduction and based its requirements on technology whose commercial viability has yet to be proven in the power sector.

“There are fundamental questions about how economically feasible this technology could be at scale,” says Devin Hartman, director of energy and environmental policy at the R Street Institute, a think tank…