It's updated constantly. This is part 2 of our series to answer that question. Part of the dioxin goes up the stack and becomes air pollution and the remainder of the dioxin stays with the ash. If the ash is thrown into a landfill, the dioxin goes with it. In this way, dioxins may be spread through the local environment.
Organic chemicals are chemicals that contain carbon atoms.
The Junk-Ford study identified 217 individual organic chemicals that have been identified by one researcher or another studying the ash or flue gases from mass burn plants. Studies since 1979 has revealed others, but here we're going to focus on just the original Junk-Ford list of 217. We wanted to know if any of these 217 chemicals had been studied for their effects on humans or laboratory animals. We have reported those ratings. If a chemical is known to cause cancer in humans or animals, we report that.