New research shows regulations are not largely to blame for the decline of Kentucky's coal industry.
Case Western Reserve University published the study.
It says a drop in demand for coal, along with increased oil and natural gas production are more responsible for the downfall of coal.
According to the study, between 2008 and 2015, coal consumption for energy production dropped by 23%.
Research also predicts the decline in coal is expected to continue for at least the next few decades.
To view the study in full, click here: Coal's Decline: Driven by Policy or Technology?