Dioxin

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Dioxin

Due to human activity, Earth had a lot of dioxins and toxins in its atmosphere, which would have provided decent nutrition for the Nestene Consciousness. (TV: Rose)

In the early 21st century, rain water had tiny but measurable amounts of cadmium, dioxin, lead and plutonium due to high pollution levels. (PROSE: Cat's Cradle: Warhead)