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Session 1: Urgency
Launching the Countdown means asking ourselves the big questions: what’s the state of the climate today? What does climate science know? How are we going to achieve a net-zero future? How do we center climate justice in our work? Hear from experts, policymakers and activists in this opening session.
Mark Ruffalo advocates for addressing climate change and increasing renewable energy.
Don Cheadle is known for his passionate performances on stage and screen, as well as his philanthropy work on climate change and human rights.
Lindsay Levin has dedicated her life to reshaping what leadership looks like, exploring our collective humanity through vulnerability and listening.
After a long career in journalism and publishing, Chris Anderson became the curator of the TED Conference in 2002 and has developed it as a platform for identifying and disseminating ideas worth spreading.
Johan Rockström works to redefine sustainable development.
Angel Hsu is a professor and data geek who applies data-driven methods to solve challenging environmental issues.
António Guterres is at the forefront of fighting the climate emergency and achieving the Sustainable Development Goals.
Latin superstar Prince Royce is a multi-platinum award-winning singer and songwriter.
David Lammy is the first Black MP to hold the Justice post in British parliament, either in government or opposition.
Christiana Figueres is an internationally recognized leader on global climate change.
Session 2: Leadership
The climate crisis demands leadership at every level. Governments, cities and businesses are three key players in designing and implementing the necessary transition. Speakers in this session will discuss putting climate back on the political and social agenda, rethinking cities, and what businesses can do to transform.
Nobel Laureate Al Gore focused the world's attention on the global climate crisis.
Jaden Smith is an actor, rapper and advocate for a cleaner world.
Severn Cullis-Suzuki is a lifelong environmental activist seeking justice for future generations.
Ursula von der Leyen believes that green and digital transformations hold the key to Europe's future prosperity and resilience.
The transparent simplicity and experiential nature of Olafur Eliasson's work has built his reputation as one of the world's most accessible creators of contemporary art.
Rebecca Henderson is an expert on innovation and organizational change.
One of the most unique voices in literature, Elif Shafak's writing blends East and West, feminism and tradition, the local and the global, Sufism and rationalism.
Jesper Brodin believes in values-based leadership and togetherness.
With passion, drive and a team of sustainability professionals, Pia Heidenmark Cook leads the sustainability agenda for the Ingka Group.
Kara Hurst leads the development and evolution of sustainability and social responsibility at Amazon.
Dave Clark leads Amazon’s global supply chain and logistics operations.
A writer and stand-up comedian, Aparna Nancherla is one of the most exciting new voices to hit the comedy scene.
Carlos Moreno brings pioneering concepts and an innovative perspective to urban issues.
As mayor of Freetown, Sierra Leone, Yvonne Aki-Sawyerr is committed to addressing her city's challenges using an inclusive, data-driven approach to urban development.
UN Goodwill Ambassador and Afropop artist Yemi Alade is known for her electrifying stagecraft and edgy style.
Session 3: Transformation
Transforming big systems is a huge task. Energy, transportation, industry and infrastructure all pose their own challenges. And yet that transformation is already happening. The experts in this session will show how and where, and offer powerful ideas for accelerating it: developing an economy without coal, decarbonizing fossil fuels, electrifying mobility and more.
Jane Fonda has had four extraordinary careers (so far): Oscar-winning actor, author, fitness guru and impassioned activist.
Xiye Bastida is one of the lead organizers of the Fridays For Future youth climate strike movement.
To combat climate change, Varun Sivaram seeks to scale up clean energy technologies and cultivate innovation ecosystems spanning industry, academia and government.
Myles Allen studies how human activities and natural drivers contribute to changes in global climate and risks of extreme weather.
Rose M. Mutiso works with a global network of experts finding solutions for energy deficits across Africa and Asia. She is also helping African women become scholars and thought leaders.
Raye Zaragoza is an award-winning singer-songwriter who Paste Magazine called "one of the most politically relevant artists in her genre."
Monica Araya works with leaders in government, business, philanthropy and activism to accelerate the shift toward emissions-free transportation.
Gloria Kasang Bulus has dedicated her life to promoting environmental ethics, sustainable use of natural resources and preserving the natural environment for future generations.
Nana Firman wants to unite the world behind a commitment to sustainability and environmental justice.
Ximena Loria works to expose the human cost of environmental problems.
Tim Guinee is a passionate advocate for creating a more sustainable world.
By blending up to 100 still photographs into a seamless composite that captures the transition from day to night, Stephen Wilkes reveals the stories hidden in familiar locations.
Session 4: Breakthroughs
The world around us is mainly made of two things: nature and the materials that we extract from it. To fight climate change, we need to protect and regenerate nature and transform materials into low or zero-carbon alternatives. This session explores the nexus of protection, regeneration and transformation using powerful examples.
In collaboration with vast networks of ecologists across the world, Tom Crowther works to address the global threats of biodiversity loss and climate change.
Sevidzem Ernestine Leikeki has a drive to care for nature, foster women's empowerment and build future nature-lovers.
How can we feed every member of a growing global population a healthy diet while preserving the planet? A TED-Ed animation written by Brent Loken.
John Doerr is an engineer, acclaimed venture capitalist and the chairman of Kleiner Perkins.
Hal Harvey works with policymakers to develop a clean energy future.
From the tiny town of Ålesund in Norway, Sigrid is a remarkable talent with a colossal mind, attitude and voice.
Karen Scrivener researches how to make cement and concrete more sustainable.
Tom Schuler has spent three decades advancing sustainable innovation across global industries.
Rahwa Ghirmatzion is deputy director of People United for Sustainable Housing, a local membership-based community organization committed to social and climate justice.
Zelalem Adefris's work in public health addresses racial health and wealth disparities, policy development and climate resilience in low-wealth communities of color.
Protecting the natural environment for future generations is one of Prince William's key priorities.
Session 5: Action
It’s time to take action. This closing session will explore the road ahead. How to think urgently and long-term about climate change. How to take into account the interests of future generations in today’s decisions. How we as individuals, communities and organizations can contribute to shaping a better future. The Countdown is on!
Priyanka Chopra Jonas is a multifaceted talent and one of the most recognized personalities in the world.
An active philanthropist, Chris Hemsworth is passionate about ocean conservation and finding solutions to climate change.
Amanda Gorman made history in 2017 by being named the first ever National Youth Poet Laureate in the United States.
Roman Krznaric writes about the power of ideas to change society.
Sophie Howe safeguards the interests and well-being of the future generations of Wales.
A United Nations Young Champion of the Earth, Miao Wang prefers to be underwater or in the sky.
Appointed by the UK Prime Minister in January 2020, Nigel Topping is the UK's High-Level Climate Action Champion.
Lisa Jackson is an environmental and social impact leader who has dedicated her career to building a greener and more just economy.
Liz Ogbu is a global expert on engaging and transforming unjust urban environments.
Known for his unusual approach to everyday issues, Andri Snær Magnason is a storyteller and environmental activist.
Countdown program curation and production: Bruno Giussani, Lindsay Levin, Chris Anderson, Juliet Blake, Logan McClure Davda, Nicole Ng and the Countdown team.