Some of them produce dioxins.

Triclosan has been shown to accumulate in biosolids in the environment, one of the top seven organic contaminants in waste water according to the National Toxicology Program Triclosan leads to various problems with natural biological systems, and triclosan, when combined with chlorine e.g. from tap water, produces dioxins, a probable carcinogen in humans.

Both companies denied this had anything to do with evidence that chlorine-bleaching produces dioxins (ie. extremely toxic, artificially produced chemicals implicated in cancer, birth defects and immune system breakdown).

The information is all there - detailing the processes of soft paper manufacture and the chemistry that produces dioxins and organochlorines (another set of highly dangerous compounds).

Hanson Cement has been criticised for using industrial waste in its kilns, which some local inhabitants claim produces poisonous dioxins.

Some environmental cleanup experts said yesterday that the intense heat of the fires from the jet fuel that exploded in the buildings could have produced hazardous dioxins from the incineration of PCB's that are contained in things like light fixtures.

As a byproduct, cotton linter is considered 100 percent recycled/recovered and, although it is bleached to make it snowy white, the process doesn't produce dioxins as with wood pulp bleaching.

Of those, 290 produce dioxins, like the DuPont plant, or other chemicals known to accumulate in the body.

Household burn barrels receive limited oxygen, and thus burn at fairly low temperatures, producing not only dioxins, but a great deal of smoke and other pollutants.

In Belgium, fats have been mixed with animal feed, and the fats, when heated, have produced dioxins.