Republic: An attorney for environmental groups who intervened on EPA's behalf said the ruling should set a precedent for plants throughout the Southwest that are dirtying the air at Grand Canyon and other parks. "What this ruling means is the court clearly recognizes that EPA has authority over the haze plan, and states like Arizona that don't require the coal plants to clean up must do so," said Michael Hiatt, and Earthjustice staff attorney representing the Sierra Club and the National Parks Conservation...