The mill released sulfurous exhaust from sulfate pulping and dioxins, an unintended toxin generated by the chlorine bleaching process used to make white pulp.
The seven individuals, whose identities were not released because there was no formal arrest, will be summonsed to appear in a district court for trespassing.
He elaborates on how other released isotopes cause leukemia (strontium-90) and birth defects (cesium-137) before wondering at the foolish futility of colour-coding radioactive gases of such lethality.