What is the fine-grained topic of the following text: It’s one of two at Indian Point Energy Center, at the bank of the Hudson river in neighboring Buchanan, among the oldest nuclear power plants still in operation, and a monument to the energy industry’s resistance to years of work by concerned scientists, locals and state officials to close down a facility that only last month dumped a plume of radioactive waste into their groundwater. Only return the topic.
Indian Point Energy Center's environmental impact and controversy regarding its operations.