Dwain Winters, Director of USEPA's Dioxin Policy Project provided a detailed analysis of the amount of dioxin in the environment along with a listing of contributing sources. Dioxin has been ruled as a known carcinogen by EPA. Important trends include a significant decline in dioxin levels in sediment, since its' peak in the early 1970's. This decline is also supported by emissions inventory data, which suggests an 80% decline in dioxin levels between 1987 and 1995. Although Waste-to-Energy facilities were at one time large contributors of dioxin, that is no longer the case. The Clean Air Act required new technologies to be placed on facilities that greatly reduced the dioxins emitted. Mr. Winters concluded uncontrolled combustion, such as backyard barrel-burning, household as well as forest fires, are likely to be the largest un-addressed contemporary dioxin source. Mr. Winters is responsible for implementing EPA's dioxin policy which may affect many new policies and regulations that EPA considers.