From its origin, CSI has provided a pathfinding forum for breaking through one of the biggest constraints associated with the current environmental regulatory system — the single-media approach to pollution control that has prevailed for more than 25 years. During this time, controlling pollution in specific media — our air, land, and water — has worked well for reducing adverse impacts from the most obvious sources, namely large industries and municipal operations. But recently, the limitations of this approach have become widely recognized. Across the country, environmental managers in industrial and municipal facilities face difficulties in trying to track, understand, and comply with multiple regulatory requirements. And EPA staff have often failed to recognize the opportunities for achieving better environmental results that lie outside their traditional realm of responsibility. In addition, concerned citizens and other interested stakeholders often have difficulty accessing and understanding environmental information and participating in environmental policy and decision-making.