Money placed in French savings accounts or life‑insurance contracts isn’t idle—it’s invested, yet savers have no visibility into where it goes. Banks tout “oil‑free” or “sustainable” funds, but the system remains opaque. Hugo Clément uncovered that unsuspecting savers are financing companies they’d rather avoid—coal, deforestation projects, and oil reservoirs among the surprising holdings of private banks and the Caisse des Dépôts et Consignations.