Schools can address environmental concerns, such as lead, asbestos and mold. In one survey, more than 90% of Pa. schools reported lead in their drinking water.
Yukon residents wanted the MAX Environmental facility shut down. EPA found nearly two dozen violations, including piles of hazardous waste exposed to the elements.
How the longtime leader of a conservation group in northeastern Pa. helped clean up the Lackawanna River, and what's next for him and the organization.
