The Michigan Supreme Court is looking at a dispute between environmental groups and a steel factory in suburban Detroit.
Environmental groups sued in 2014 after Michigan regulators changed an air-quality permit at the AK Steel plant in Dearborn, formerly known as Severstal.
AK Steel argued that critics waited too long to challenge the permit in court. But a Wayne County judge and the Michigan appeals court have ruled against the company.
In an order dated Friday, the Supreme Court said it will hear arguments at a future date. The court could take some action or it could allow the appeals court decision to stand.
