THE PREVIOUS CHAPTERS HAVE FOCUSED on our current understanding of the prevalence of radon in indoor environments, the potential health risks associated with indoor exposure, the available techniques to measure and mitigate indoor radon levels, federal radon legislation, and the U.S. Environmental Protection Agency's (EPA) Radon Action Program. This final chapter builds upon this understanding and the existing uncertainties in the knowledge base to identify future policy perspectives and the research needed to adequately support these policies.