Residents aren't the only ones who have staked their claims to their homes. Coal dust has nestled its way into their homes as a permanent, but unwelcome roommate. UM News reporter Stephanie Hansen and photographer Scott Ranf found out how coal is currently affecting students who live near the tracks. Arch Coal contributes 16 percent of America's annual coal, making them the second largest coal producer in the U.S. BNSF and Montana Rail link. would be shipping the coal.