PITTSBURGH (AP) — More than 2,000 union workers and others organized by the coal industry in Pennsylvania, Ohio and West Virginia joined top state elected officials Wednesday to rally against proposed stricter federal pollution regulations for coal-burning power plants.

The rally came a day before the Environmental Protection Agency holds public hearings in downtown Pittsburgh. It says its proposed regulations will cut carbon pollution 30 percent by the year 2030. Hearings were held in Atlanta, Denver and Washington on Tuesday and Wednesday.