 The Environmental Protection Agency created the Good Neighbor Rule to address that cross-state problem. 23 states would have to clean up their power sources and industrial activities. Three, Ohio, West Virginia, and Indiana, filed a lawsuit objecting. They said the plan overrode the states' own pollution initiatives and would be too expensive. The rule is now on hold while lower courts reconsider it. The Supreme Court has weakened or rolled back many environmental rules in recent years. Alejandra Burunda, NPR News.