Ideas change everything

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Playlist

The must-watch climate talks of 2022

A selection of potentially planet-saving TED Talks from Countdown, TED's initiative to champion and accelerate solutions to the climate crisis

Yuval Noah Harari

The actual cost of preventing climate breakdown

Nobody really knows how much it would cost to avoid the worst impacts of climate change. Yet historian Yuval Noah Harari's analysis, based on the work of scientists and economists, indicates that humanity might avert catastrophe by investing the equivalent of just two percent of global GDP into climate solutions. He makes the case that preventing ecological cataclysm will not require the major global disruptions many fear and explains that we already have the resources we need -- it's just a matter of shifting our priorities.

A new social contract for global climate justice

Pakistan contributes less than one percent to the global greenhouse gas emissions perpetrating climate change, yet one-third of the country was recently inundated with "biblical" floods that killed hundreds and displaced millions. If we're to move towards a sustainable future in the wake of such tragedies, the response will require more than just infrastructure repairs and a return to the status quo, says columnist Huma Yusuf. She shares a vision for global climate diplomacy where the countries responsible for pollution pay reparations for the damage they've caused, while developing countries bring forward a clean, green future. (Followed by a Q&A with TED Global Curator Bruno Giussani)

Sister True Dedication

3 questions to build resilience -- and change the world

Every moment of movement is a chance to become more aware of yourself and the world around you, says Zen Buddhist nun Sister True Dedication. Guiding us through the art of "mindful walking," she shares three essential questions to ask yourself to awaken your strength, build resilience and discover your inner peace.

Fehinti Balogun

How to find your voice for climate action

Actor and activist Fehinti Balogun pieces together multiple complex issues -- climate change, colonialism, systemic racism -- in a talk that's part spoken-word poem, part diagnosis of entrenched global problems. Seeing the connections is a way to unlock collective solutions, he says -- and you have the power to reimagine what you think is possible.

How green hydrogen could end the fossil fuel era

As climate change accelerates, finding clean alternatives to fossil fuels is more urgent than ever. Social entrepreneur Vaitea Cowan believes green hydrogen is the answer. Watch as she shares her team's work mass producing electrolyzers -- devices that separate water into its molecular components: hydrogen and oxygen -- and shows how they could help make green, carbon-free fuel affordable and accessible for everyone. "This is how we end the fossil fuel era," Cowan says.

How wind energy could power Earth ... 18 times over

Over the last two decades, the wind power industry has grown at a dizzying pace. (Fun fact: a single rotation from one of the world's most powerful wind turbines can generate enough electricity to charge more than 1,400 cell phones.) Building off this exponential growth, Denmark's climate minister Dan Jørgensen lays out his plan to end the country's oil industry by 2050 and transition to a fossil-free future powered by wind energy.

Vishaan Chakrabarti

A vision of sustainable housing for all of humanity

By 2100, the UN estimates that the world's population will grow to just over 11 billion people. Architect Vishaan Chakrabarti wants us to start thinking about how we'll house all these people -- and how new construction can fight climate change rather than make it worse. In this visionary talk, Chakrabarti proposes a "Goldilocks" solution to sustainable housing that exists in the sweet spot between single-family homes and towering skyscrapers.

The blind spots of the green energy transition

The world needs clean power, but decarbonization calls for a massive increase in the mining and extraction of minerals like lithium, graphite and cobalt. Environmental peacemaking expert Olivia Lazard sheds light on the scramble for these precious mineral resources -- and how the countries that control their supply chains (including China and Russia) could find themselves at the center of the new global stage. Learn why Lazard thinks planetary security depends on our ability to de-escalate resource competition and avoid the same mistakes that led to the climate crisis.

What seaweed and cow burps have to do with climate change

Scientists have long known that cows are a huge source of the greenhouse gas methane, contributing up to four percent of emissions globally. But could there be a way to make cattle less -- ahem -- gassy? Animal scientist Ermias Kebreab talks through an ingenious solution to reduce methane-rich cow burps by feeding cattle something growing below the surface of the ocean: seaweed.

Vanessa Nakate and Mary Robinson

The global opportunity to accelerate Africa's sustainable future

Climate justice activist Vanessa Nakate sits down with former president of Ireland Mary Robinson for an enlightening, intergenerational conversation about the state of the climate crisis. Nakate paints a picture of life in her home country of Uganda -- which faces prolonged droughts, landslides and flooding stemming from climate change -- and clarifies the need for energy-rich, high-emitting nations to provide climate finance for Africa and accelerate the continent's sustainable future. "We cannot solve the problems that are happening right now with the very system that created them," Nakate says. "We need something new."

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