The influential leader known for her environmental activism in the Amazon rainforest is Chico Mendes. Although a male figure, it’s worth noting that many women have made significant contributions, such as Marina Silva. Mendes focused on protecting the rainforest and advocating for the rights of indigenous people against deforestation. His activism led to international recognition of environmental issues, particularly concerning deforestation and sustainable development. His assassination in 1988 sparked global awareness of the environmental crisis in the Amazon and galvanized further conservation efforts.