The EPA has just released new requirements on the containment of coal ash. The agency promised to address the issue after a retention wall failed at the Kingston coal-fired power plant in Tennessee, spilling more than a billion gallons of arsenic and mercury laden slurry into the nearby river. But a ruling on the toxicity of coal ash is long overdue. In conversation with host Jeff Young, Thomas Adams of the American Coal Ash Association argues that a tough ruling would hinder the safe re-use of coal ash. But Wake Forest University Professor Dennis Lemly says EPA should designate coal ash a hazardous substance.