Robert Murray, a high-profile coal executive, has died. He was 80.
Murray, who was known as the "King of Coal," died from lung disease complications on Sunday in Ohio, CNN reported Monday.
Murray long advocated against environmental protections and federal regulations that would reduce black lung disease, which he was diagnosed with in 2016.
According to the Pittsburgh Post-Gazette, Murray was known to bring oxygen along with him to coal industry events after his diagnosis.
Earlier this month, Murray filed an application for black lung benefits with the U.S. Department of Labor, the Associated Press reported. In the application, Murray reportedly said that he was "near death" and dependent on oxygen.
'''King of Coal''' Robert Murray Dies at 80 from Lung Disease Complications | PEOPLE.com