October 12 – 15, 2021
4 days of inspiring talks and commitments to climate solutions for industry leaders in Edinburgh, Scotland.

Local TEDx

October 30 – December 31, 2021
Hundreds of communities around the world hosted TEDx Countdown events in 2021, and shared local stories and solutions.


October 30, 2021
This virtual event aired on YouTube on October 20, 2021, and shares highlights from the Summit and a realistic pathway to a net zero future.

October 12-15, 2021


Edinburgh, Scotland

In October 2021, we invited the brightest thinkers and doers from around the world to gather for the first-ever in-person TED climate conference — four days of inspiring talks, collaboration, connections and commitments to meaningful action for a better world.

Ahead of the pivotal 26th UN Climate Change Conference (COP26) in Glasgow, the Countdown Summit unveiled some of the imaginative and scalable solutions that we’ll need to turn the tide on climate change and create a healthier and more equitable world for all.

A net-zero future is possible. That’s why we hosted this gathering for politicians, business leaders, policy makers, scientists, Indigenous leaders, artists, philanthropists, youth activists and others to organize and work together to make that future a reality.

October 30 – December 31, 2021


Around the world

Companies, cities, partners, citizens and TEDx organizers joined the Countdown conversation, helped spread the word, and discussed local solutions by hosting TEDx Countdown events in their communities between October 30 through the end of 2021.


Virtual sessions to guide you through how to organize a successful virtual or in-person TEDx Countdown event, led by the TEDx team and experienced TEDx organizers


A host guide with discussion topics and program details, as well as a design identity kit with graphics to use for your event’s digital and physical spaces

October 30, 2021




The Countdown global livestream aired on October 30 on YouTube at 12pm ET. Building on the success of the 2020 Countdown launch,this virtual event will laid out a credible and realistic pathway to a net-zero future by bringing together key solutions from the Countdown Summit, stories of local action from the around the world, cutting-edge science and technology, social and cultural discussions, powerful performances and a global call to action.

By presenting a real pathway to achieving net-zero, the Countdown global livestream brought people all over the world together to celebrate and spread the word ahead of the decisive United Nations Climate Conference COP26.