The idea was originally from Jean-Claude Carrière, but director Louis Garrel didn't like the idea of children taking on these very adult projects, as it felt fake to him. He talked about it to his friends and they all agreed with him, which vexed the writer, but then Greta Thunberg made the news with her school strike and Garrel realized it wasn't so far-fetched after all.
The pollution alert sequence was written before the COVID-19 pandemic, which enabled a very easy shoot for the scenes of empty Paris streets during the 2020 lockdown.
The film was selected in the ephemeral "Cinema for the Climate" section of the 2021 Cannes Film Festival.