Dioxins and furans are toxic, persistent, and bioaccumulative chemicals that are found in very small amounts in the environment, including air, water and soil. Exposure to these substances has been associated with a wide range of adverse health and environmental effects. Dioxins and furans are byproducts of the combustion of garbage, wood and other fuels and can also be generated by some industrial processes. The CEC is working to understand how much of these chemicals is present in the environment, foods and humans, as well as where they come from and how they are transported. This work also includes an examination of strategies and the preparation and dissemination of information on reducing the risks of exposure.