The Tragedy of Air Pollution -- and an Urgent Demand for Clean Air | Rosamund Adoo-Kissi-Debrah |TED

How Film Captures the Space Between Hope and Despair | Mounia Akl | TED

The Incredible Cancer-Detecting Potential of Photoacoustic Imaging | Lei Li | TED

War in Ukraine -- and What It Means for the World Order | Ian Bremmer | TED

Sustainable Cooling That Doesn’t Warm the Planet | Rachel Kyte | TED Countdown

The Mind-Bending Art of Deep Time | Katie Paterson | TED

The New Reality of Fashion is Digital | Gala Marija Vrbanic | TED

How to Fix Broken Supply Chains | Dustin Burke | TED

The War in Ukraine Could Change Everything | Yuval Noah Harari | TED

Language Shouldn't Be a Barrier to Climate Action | Sophia Kianni | TED Countdown

Why a Free and Fair Internet Is More Vital than Ever | Priscilla Chomba-Kinywa | TED

Use Your Voice, Vote and Wallet for Climate Action | Halla Tómasdóttir | TED

Virginia Smith: The global risk of flooding -- and how to turn the tide | TED

Jim Hagemann Snabe: Dreams and details for a decarbonized future | TED Countdown

Karen Lellouche Tordjman: Siri, Alexa, Google ... what comes next? | TED

Tom Osborn: A new way to help young people with their mental health | TED

Peachy Liv: How to protect your mental well-being online -- from a Gen-Zer | TED

Jane Velkovski: The life-changing power of assistive technologies | TED

Nkosilathi Nyathi: A next-generation solution to the climate crisis | TED

Elizabeth Zion: The need for family reunification -- to make families whole again | TED

Makhtoum Abdalla: Education is a fundamental right for every child | TED

Adrian K. Haugabrook: 3 ways to lower the barriers to higher education | TED

Eric Hinterman: How going to Mars improves life on Earth | TED

Shweta Narayan: It's impossible to have healthy people on a sick planet | TED Countdown

Nemonte Nenquimo: The forest is our teacher. It's time to respect it | TED Countdown

John Doerr and Ryan Panchadsaram: An action plan for solving the climate crisis | TED Countdown

Jamil Zaki: How to escape the cynicism trap | TED

Nili Gilbert: The crucial intersection of climate and capital | TED Countdown

Tim Dunn: How we're reducing the climate impact of electronics | In The Green

Derek Sarno: The many reasons to eat a plant-based diet | TED Countdown

Jane Walsh: The rise of predatory scams -- and how to prevent them | TED

Candace Parker: How to break down barriers and not accept limits | TED

Jennifer Aaker and Naomi Bagdonas: Why great leaders take humor seriously | TED

Nicola Sturgeon: How small countries can make a big impact on climate change | TED Countdown

Aicha Evans: Your self-driving robotaxi is almost here | TED

Farwiza Farhan: The powerful women on the front lines of climate action | TED Countdown

Katie McGinty: Smart solutions to decarbonize buildings | In the Green

Josh Giegel: Super speed, magnetic levitation and the vision behind the hyperloop | TED

Naima Penniman: "Being Human" | TED Countdown

Children of Palau: Leave only footprints that will wash away | TED Countdown

Gavin McCormick: Tracking the whole world's carbon emissions -- with satellites & AI | TED Countdown

Hongqiao Liu: Can China achieve its ambitious climate pledges? | TED Countdown

Tzeporah Berman: The bad math of the fossil fuel industry | TED Countdown

Jeff Dean: AI isn't as smart as you think -- but it could be | TED

Amina J. Mohammed: A new perspective on the journey to net-zero | TED Countdown

Nithya Ramanathan: The problem of vaccine spoilage -- and a smart sensor to help | TED

How Much Clean Electricity Do We Really Need? | Solomon Goldstein-Rose | TED Countdown

Chris Bennett: A close-to-home solution for accessible childcare | TED