This document addresses the issue of dioxins—one of the pollutants emitted by waste incinerators—in a question-and-answer format: the nature and origin of dioxins; the fate of dioxins in the environment and the food chain; municipal solid waste incineration plants (MSWIPs); human exposure to dioxins (routes of exposure and individual or collective measures to reduce exposure); toxicokinetics and effects of dioxins, sensitive populations; methods for measuring dioxin levels; types of studies.