The major focuses in the life of environmentalist Wangari Maathai included the promotion of sustainable development, environmental conservation, and women's empowerment. As the founder of the Green Belt Movement, Maathai emphasized the importance of tree planting as a means to restore the environment and combat deforestation in Kenya. Her advocacy for women engaged in environmental stewardship highlighted the link between gender equality and environmental health. Maathai's achievements earned her the Nobel Peace Prize in 2004, recognizing her efforts to address the intertwined crises of environment and social justice.