Martha Delgado Peralta is an environmentalist renowned nationally and internationally, with more than 29 years of professional experience in public service through the Public Federal Administration and nongovernmental organisations. In her position as the President of the Union of Environmental Groups of Mexico she was one of the strongest campaigners for the Defense of the Grey Whale. She also served as the Deputy Head of the World Water Council and the President of the Network of Environmental Management Authorities in Cities in Latin America and the Caribbean. As an Independent Representative in the III Legislature in Mexico City, she created and presided the Special Commission for the Integral Management of Water. Her outstanding role as the Minister of Environment of Mexico City involved key projects such as the Climate Action Plan, the Rescue the Magdalena River, and the Program ‘Green If Your City’. This consolidated the city’s leadership on a global scale. In 2019, she was the President of the First Session of the UN-Habitat Assembly and became a Sherpa for Mexico before the High-Level Panel for a Sustainable Ocean Economy, a position she proudly holds to this day.