The thick plume of smoke that rose after the fireplace at Notre-Dame de Paris contained a number of billion lead particles from the roof and spire. Five years later, when the cathedral was rebuilt identically, a collective denounced an “omerta” and a “denial” from the authorities across the dangerousness of this steel.
https://www.france24.com/fr/france/20241204-notre-dame-de-paris-cinq-ans-de-reconstruction-%C3%A9maill%C3%A9s-de-d%C3%A9bats-sur-la-pollution-au-plomb