Indiana is once again headed to federal court to block the Environmental Protection Agency's new Clean Power Plan.
Indiana was part of an effort to block the EPA's power plant rule before it became final. The latest lawsuit – involving Indiana and 23 other states – takes aim at the regulation now that it's taken effect.
The EPA rule would require Hoosier State power plants to reduce their carbon emissions between 30 and 38 percent by 2030 — a mandate Gov. Mike Pence calls ill-conceived, saying it will be too costly for the state to comply.
Attorney General Greg Zoeller says the EPA's rule constitutes federal overreach, arguing the agency doesn't have authority under the Clean Air Act to regulate carbon emissions any further than it already did.
Environmental groups have praised the EPA rule, hailing it as a move to reduce pollution and boost the state's clean energy industry.
Pence has previously said Indiana will not comply with the rule if it's not changed.