Observatoire des droits humains (anglais seulement)

Conclave: the chemistry behind the black and white smoke

(Version anglaise seulement)

par Mark Lorch, Professor of Science Communication and Chemistry, University of Hull

This week, 133 cardinals have gathered in the Vatican to elect a new leader of the Catholic church. During their deliberations, the only indications of their progress are the regular plumes of smoke wafting from a freshly installed chimney perched on the roof of the Sistine Chapel.

Tradition holds that black smoke indicates the cardinals have not yet agreed on a new leader, while white smoke signals that a new Pope has been elected. But what…

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