The climate crisis is real, but so are the solutions. And the people leading the charge aren't just scientists in lab coats. They're ecologists, activists, CEOs and young people.
From the academic world to the arenas of business and entertainment, we've chosen 9 top influential voices to pay attention to in 2025. The people driving the global conversation and action on climate change. In this article, we’ll explore some of the most influential figures who are making a difference.
Let's meet the faces behind the change.
Academics: Pioneers of climate science and action
1. Rachel Kyte - United Kingdom: A seasoned champion for climate action
With an illustrious career spanning academia, international organisations, and the World Bank, Rachel Kyte's influence on climate action is undeniable. As the Dean of The Fletcher School at Tufts University, she's not only nurturing the next generation of climate leaders but also actively shaping global climate policy discussions. Her experience in leading the World Bank's climate change initiatives lends her a unique perspective, bridging research and practical implementation.
2. María José Sanz - Spain: A lifelong commitment to climate science
María José Sanz is a shining example of a scientist turned influential advocate. Her research on air pollution and the carbon cycle has contributed significantly to global climate governance. A recipient of the Nobel Peace Prize and numerous other accolades, Sanz's tireless efforts in bridging the gap between science and policy-making are commendable. Her leadership at Basque Centre for Climate Change (BC3), Bilbao, continues to shape crucial climate research and inform policy decisions.
3. Hoesung Lee – South Korea: A significant contribution to the IPCC
As the Chair of the Intergovernmental Panel on Climate Change (IPCC), Hoesung Lee is at the helm of the world’s most authoritative body on climate science. His work as an economist focusing on climate change, energy, and sustainable development has been instrumental in guiding global policy. Lee's leadership in the IPCC has seen the production of comprehensive reports that influence climate policy worldwide. His academic rigor and commitment to sustainable development make him a vital figure in the ongoing efforts to mitigate climate change.
Business: Innovators and entrepreneurs driving change
4. Mónica Araya – Costa Rica: Driving electric dreams
Mónica Araya's relentless pursuit of sustainable transportation is electrifying. Her early advocacy for clean energy in Costa Rica and leadership in the Climate Champions group at COP26 underscore her dedication. Araya's work exemplifies how individuals can spark change, even in traditionally male-dominated fields. Her story serves as an inspiration to all who dare to dream of a greener future.
5. Kotchakorn Voraakhom - Thailand: Reimagining urban landscapes
Kotchakorn Voraakhom's innovative approach to urban landscape architecture is transforming cities into greener, more resilient spaces. Her projects, such as the Chulalongkorn Centenary Park and Chao Phraya Sky Park, showcase the potential of integrating nature into urban design. Voraakhom's work is a testament to the power of creative solutions in addressing climate change challenges.
Policymakers: Steering us towards a more sustainable future
6. Antonio Guterres – Portugal: A diplomat for climate action
As the Secretary-General of the United Nations (UN), Guterres has consistently pushed for stronger commitments to reduce greenhouse gas emissions and has been a vocal supporter of the Paris Agreement. His leadership at the UN has been pivotal in keeping climate change at the top of the global agenda, making him one of the most influential policy makers in the fight against climate change.
7. Marina Silva - Brazil: A voice for the Amazon
Marina Silva's journey from the Amazon rainforest to Brazil's Ministry of the Environment is nothing short of remarkable. Serving as Brazil’s Minister of the Environment from 2003 to 2008 and again in 2023, she has led efforts to combat deforestation and protect the Amazon. Her internationally recognized activism and policies have been key in reducing illegal logging and fires, making her work vital not only for Brazil but for the global climate. Silva's ongoing commitment in government underscores the importance of strong leadership in the fight against climate change.
Civil Society: The power of collective action
8. Greta Thunberg - Sweden: The voice of a generation
No discussion of climate change would be complete without mentioning Greta Thunberg. Her unwavering determination and fearless advocacy have inspired millions around the world to join the fight for climate action. Thunberg's Fridays for Future movement is a testament to the potential of collective action in driving change.
9. David Attenborough – United Kingdom: Narrating nature's plight
David Attenborough's documentaries have captivated audiences for decades, showcasing the beauty and fragility of our planet. His powerful storytelling has raised awareness about the devastating impacts of human activity on the natural world. Attenborough's influence extends beyond entertainment. Though now in his 90s, his advocacy continues to spur significant conservation efforts and policy changes.
Top influential voices 2025: Leading the charge for a more sustainable tomorrow
The fight against climate change requires voices from all corners of society. Whether they come from academia, business, policy-making, or civil society, the individuals highlighted here are significantly contributing to our understanding of climate change and how we can combat it. Their work inspires us to act, innovate, and strive for a more sustainable future. As we continue to face the challenges of climate change, these leaders remind us that impactful change is possible through determination, collaboration, and a shared vision for a better world.
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