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EXPLORE HOW GOLDMAN PRIZE WINNER RANDALL ARAUZ IS

Protecting Costa Rica’s Sharks

Marcelo Mena

October 15, 2025

A member of the Jury since 2025, Marcelo Mena is the founding CEO of the Global Methane Hub, the world’s first globally coordinated philanthropic effort dedicated to reducing methane emissions, which has advanced policies and projects in over 150 countries and leveraged over $20 billion in climate finance. A biochemical engineer who earned his MS and PhD in environmental engineering from the University of Iowa with a postdoctoral fellowship at MIT, Mena served as Chile’s Environment Minister and Undersecretary (2014-2018) under President Michelle Bachelet, where he achieved landmark accomplishments, including implementing South America’s inaugural carbon taxes for power generation and vehicle sales, orchestrating a pioneering coal phase-out agreement, establishing 45,000 square kilometers of national parks, and protecting 1.3 million square kilometers of ocean—helping increase Chile’s protected areas from 8% to 36%. Currently a professor at Pontificia Universidad Católica de Valparaíso, Mena has received numerous accolades for his environmental leadership, including awards from NASA, the EPA, UNEP, and National Geographic; a Fulbright fellowship; and appearing in the TIME100 Climate list for 2024. 

Recent Posts

Prize Winners Today: Protecting Costa Rica’s Shark Biodiversity with Randall Arauz


September 17, 2025 – By Paige Smith

Randall Arauz knows what it takes to move the needle on marine conservation: a combination of effective policy change, shifting public opinion, and persistence. Randall, a passionate and seasoned conservationist famous for fighting against shark finning, has been advocating for critically endangered sea turtles and sharks—and improving Costa Rica’s environmental laws—for over 30 years.   We…

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Honoring Robert Redford: Environmentalist, Actor, and Decent Human Being


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Environmental Leadership in Tunisia: A Q&A with Semia Gharbi


June 30, 2025

A lifelong environmental educator and scientist, Semia Gharbi is the 2025 Goldman Environmental Prize winner for Africa. In our discussion, Semia digs into her work as an environmental advocate in Tunisia, starting with her Goldman Prize-winning campaign to reverse the illegal import of waste into her country. Semia also discusses her collaborative work to build…

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