Ducobu Goes Green is the fourth film in the Ducobu series. Actor Élie Semoun talks to Anne-Elisabeth Lemoine on the set of "C à vous" "We were the most eco-responsible shoot in cinema, we saved 400 tonnes of CO2,” he says.

“And then I have all my actors... So I’m recycling. I'm taking back the old ones," he adds, before adding: "and I'm renewing the stock of children so..."