The Resource Conservation Challenge (RCC) is now in its fourth year. During our first two years, the RCC built on the Environmental Protection Agency's (EPA's) tradition of collaboration and partnerships to achieve common environmental goals-reuse, recycling, toxics reduction, and resource and energy conservation. Through this effort, we are advancing environmental stewardship, fostering cradle-to-cradle management of materials, and conserving energy and resources. This progress report highlights the RCC's achievements, recognizes new areas of interest and collaboration, and lays the framework for the future work of the RCC. Among other things, we identified four priority areas on which to focus: (1) municipal solid waste recycling, (2) reusing and recycling industrial materials, (3) priority and toxic chemical reductions, and (4) green initiatives- electronics. We welcomed new partners and existing partners fulfilled commitments from past years. We celebrated new successes, issued new challenges, and created new programs in areas that were ready to move forward. These programs will continue to be a core part of the RCC.