At

» READ MORE: http://go.philly.com/epa

Video excerpts from an interview with EPA Administrator Stephen L. Johnson.

Video excerpts from interviews related to Performance Track.

Documents and audio from significantcourt cases related to EPA rulemaking, including arguments before the U.S. Supreme Court.

An interactive graphic showing how scrubbers work at coal-fired plants.

A link to a searchable EPA database of environmental enforcement reports on companies nationwide.