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Arsenic in landfills is still leaching into groundwater − 20 years after colleagues and I learned how the ‘king of poisons’ could escape trash dumps

By Gumersindo Feijoo Costa, Catedrático de Ingeniería Química, Universidade de Santiago de Compostela

Arsenic has long been considered “the king of poisons.” Films such as “Arsenic and Old Lace” by Frank Capra and “The Name of the Rose” by Jean-Jacques Annaud illustrate the deadly effect that a high dose has on people.

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