The Post explains:
The Supreme Court on Tuesday blocked a key part of President Obama’s ambitious proposal to limit carbon emissions and reduce global warming while the plan is challenged. . . . The court’s decision does not address the merits of the challenge but indicates justices think the states have raised serious questions.
The administration’s initiative, which is still in the planning stages, required states to submit plans for shifting away from fossil-fuel power plants in favor of alternative forms of energy. It is aimed at reducing emissions of carbon dioxide at existing plants by about a third by 2030.
More than two dozen states, along with coal and utility companies, are challenging the program. Given the pace of the legal proceedings, the stay could remain in place until after the next president is sworn in.
Here's the story.