Environmental leadership rarely fits one job title. It shows up in a UN corridor, a courtroom, a laboratory, a fishing village and a forest at the same time. The people on this list protect rivers, price carbon, negotiate treaties, run companies and organise their neighbours, and each one has found a genuinely different lever to pull. What connects them is not a shared style. It is a willingness to stay with hard, slow problems long after the novelty has worn off, and to kee