Through this website and the scientific and educational activities of its members, the Community Exposure Science Collaborative (CESC) provides freely-available resources, including the Personal Exposure Toolkit (PET), to support and guide communities and individual citizens in gathering and sharing original Exposure Science data. This site can help generate, consolidate, analyze, and disseminate results and findings from community-based Exposure Science investigations.  If you or your organization would like to collaborate or contribute resources, please drop us a line.  Visit the Site FAQ for more information.