As the climate crisis intensifies, litigation has found renewed impetus as a tool for protecting the environment, stopping harmful projects, and holding authorities to account. Raymond Avrillier’s pioneering and decades-long legal activism in France has led to significant success, including bringing down ex-government minister and former Grenoble mayor Alain Carignon. In an interview with Benjamin Joyeux, he details his long journey and why he chose to undertake it largely in courtrooms.