David Olsson is the co-founder and COO of We Don't Have Time.

Astrid Caldas is a senior climate scientist at the Union of Concerned Scientists, where her work focuses on climate change adaptation and science communication, with practical policy implications for ecosystems, the economy, and society - including equitable and just adaptation and resilience measures. She was born and raised in Rio de Janeiro, Brazil, where she started her career as a field ecologist. After moving to the United States in 1996, she staged a change that brought her to the arena of climate change science and policy, and related issues of climate justice, biodiversity, and sustainability. Dr. Caldas has advised or consulted on projects with the Smithsonian Institution and the National Socio-Environmental Synthesis Center, and has worked in both domestic and international settings. Dr. Caldas holds a Ph.D. in ecology and Master’s in entomology and environmental management.

Chris Gloninger is a meteorologist and climate communicator who made national headlines after receiving death threats in Iowa for reporting on the links between extreme weather and climate change. His experience highlighted the growing risks faced by journalists covering climate science and strengthened his commitment to improving public understanding of our changing world. An Emmy-winning broadcaster with nearly two decades of experience across the United States, he launched one of the first weekly television series focused on climate change. Today, Chris is a climate scientist at Woods Hole Group – A CLS Company, where he works on building community resilience to a rapidly changing climate.

Princess Esméralda is also a passionate human rights' campaigner and an environmental activist and has spoken out on a number of sensitive issues. She believes that we all have a responsibility to confront the past and build a better society in the future.

Geoffrey is a Youth Advisor for WeDon'tHaveTime and Climate Activist from low-lying land in Nairobi and has felt firsthand climate impacts in the form of environmental degradation around his neighbourhood. Inspired by his background, Geoffrey advocates for the connection between climate action and poverty. He speaks passionately and urgently about social justice, environmental protection, climate change, indigenous rights, and more, and isn’t afraid to call out corporate leaders and others who have contributed to our environmental crises. Despite the backlash he has received from, politicians, and even strangers, Geoffrey remains determined to continue his activism and bring about meaningful change.

Roxani Roushas is the Global Lead of the Youth4Climate initiative, co-led by UNDP and the Government of Italy. The initiative works to identify, amplify, support and scale youth-led climate breakthroughs and provides financial and technical resources to youth-led innovations. Prior to taking on this role, Roxani was based in Jordan with UNDP’s Regional Innovation Team for Arab States, supporting initiatives on youth-led innovation, women’s digital entrepreneurship, and enhancing country-level development programming through the use of foresight, behavioural science and systems thinking. Roxani has also worked with UNDP Somalia, the Delegation of the European Union to the African Union, and the International Labour Organization. She holds a Bachelor of Arts in Economics and Politics from the University of Essex and a Master of Science in Migration Studies from the University of Oxford.