TEDTalks (video)

In the US, people spend the overwhelming majority of their time inside buildings that burn fossil fuels, which are bad for both the environment and human health. (Think: breathing in air pollution from gas stoves, furnaces and water heaters.) If we're going to fix this problem, we need to retrofit millions of buildings with all-electric equipment, says energy upgrader Donnel Baird. Hear about his ambitious plan to rip the fossil fuel infrastructure out of aging buildings and upgrade it with smarter, cleaner, healthier technology.

When it comes to technology, we're often presented with two contrasting visions of the future: one where technology fulfills all our desires, and another where it leads to chaos and conflict. Sociologist Ruha Benjamin is here with a more radical vision of the future — one where humanity isn't saved or slayed by technology, but rather uses it to uplift ordinary people and make things like health care and housing for all a reality.

The world has plenty of clean energy. The problem is storing that energy and getting it where we need it, when we need it, says battery recycling pioneer Emma Nehrenheim. While batteries are fundamental to powering a sustainable future, their production is surprisingly harsh on the environment. She lays out the science behind a breakthrough in recycling a battery's core elements, offering a manufacturing solution that could vastly reduce the industry's environmental impact and demand for new materials from mining.

From World War I to the 2008 economic collapse and beyond, history shows that economists don't always see the future as clearly as they think they do, says economist David McWilliams. Using the words of W.B. Yeats, McWilliams makes the case for embracing unconventional thinkers – poets, artists and musicians – and offers a creative path towards a world filled with less confirmation bias and more understanding.

AI won't kill us all — but that doesn't make it trustworthy. Instead of getting distracted by future existential risks, AI ethics researcher Sasha Luccioni thinks we need to focus on the technology's current negative impacts, like emitting carbon, infringing copyrights and spreading biased information. She offers practical solutions to regulate our AI-filled future — so it's inclusive and transparent.

Drawing on his decades-long mission to formulate the world in computational terms, Stephen Wolfram delivers a profound vision of computation and its role in the future of AI. Amid a debut of mesmerizing visuals depicting the underlying structure of the universe, he provides a sweeping survey of his life's work, offering a new perspective on the applications — and consequences — of AI powered by computational language.

Using paychecks, perks and carefully worded mission statements plastered on posters, companies are on a never-ending quest to find what drives morale at work. An underappreciated solution lies in the answer to one simple question, says management researcher David Burkus. With notable examples backed by decades of success, he presents a clear path to inspiring your team — and finding your purpose at work.

There's a saying that comedy is tragedy plus time. Perhaps that's why some of our biggest problems feel easiest to manage with a dose of humor. Comedian, journalist and actor Roy Wood Jr. has spent his career finding the silly in the serious and using this tactic to influence real change. Listen in to learn how you can tap into the powers of humor in your own life. (This conversation, hosted by comedian Chris Duffy, was part of an exclusive TED Membership event. TED Membership is the best way to support and engage with the big ideas you love from TED. To learn more, visit ted.com/membership.)

When technologist Luis von Ahn was building the popular language-learning platform Duolingo, he faced a big problem: Could an app designed to teach you something ever compete with addictive platforms like Instagram and TikTok? He explains how Duolingo harnesses the psychological techniques of social media and mobile games to get you excited to learn — all while spreading access to education across the world.

Rice is the world's largest food source — and it's also a massive emitter of methane gas, a key contributor to climate change. Fifth-generation rice farmer Jim Whitaker and his daughter, farmer and conservationist Jessica Whitaker Allen, are working to slash rice's environmental impacts with innovative, sustainable farming practices. They share how they're keeping their family farm in Arkansas profitable while also spreading green farming practices to their neighbors — and, eventually, the rest of the world. "If you take care of the planet, it will take care of you," says Whitaker Allen.

How do we defend people's freedom and dignity against authoritarianism, when the "law of war" doesn't seem to apply anymore? In the face of the Russian occupation of Ukraine, human rights lawyer and Nobel laureate Oleksandra Matviichuk considers this question every day. Exposing the failures of the international system of peace and security, she highlights the capabilities of ordinary people during extraordinary times — and urges us all to take an active position in the struggle for freedom. (This talk contains graphic imagery.)

In the long term, shutting down a coal mine means cleaner air and a healthier environment — but in the short term, it can devastate a community or family that relied on the mine's paychecks to make ends meet. Environmental justice advocate Payton M. Wilkins thinks we can protect both workers and the planet with an age-old solution: unions. He digs into the economic fallout of ditching fossil fuels and shows why unions are well-positioned to push the transition to clean energy and green jobs.

For people living in poverty, a guaranteed income can mean finally having the space to dream of a comfortable life. Sharing the stories of single moms who participated in a first-of-its-kind program that offered them $1,000 per month with no strings attached, poverty disrupter Aisha Nyandoro calls for us to redefine what it means to be wealthy — putting aside lavish vacations and fancy cars in favor of paid bills and a well-fed family — and to listen when people tell us what they need most.

Dasha Navalnaya is the daughter of Alexey Navalny, the politician and leader of the Russian opposition to Vladimir Putin. Sharing the story of her father's poisoning, persecution and current imprisonment, she details what it was like growing up under the watchful eye of government surveillance as her father led a decade-long investigation into the corruption of Putin's regime — and shows why paying attention to what happens in Russia matters to everyone, everywhere.

How is the US going to reach net zero by 2050? That's the question Asmeret Asefaw Berhe, director of the Office of Science for the US Department of Energy, is urgently trying to answer. She shares the thinking behind what her team is calling "Energy Earthshots" — projects designed to accelerate innovation in the fight against climate change, from nature-based solutions in the soil to the creation of brand-new technologies — and calls for innovative, equitable policies backed by science.

The Hamas attacks on Israel in October 2023 stunned the world. In this timely conversation, political scientist Ian Bremmer explains the historical context of the conflict, how Israel might respond and what it means for Jews, Palestinians and the world at large. Listen in for analysis of the unprecedented events, how the US may factor into the global response and how to find reliable information amid the breathless media coverage and the fog of war. (This interview, hosted by TED's head of curation Helen Walters, was recorded on October 9, 2023.)

How do we stand before the pain and promise of the world and keep hope and courage alive? Journalist and podcast host Krista Tippett has spent a career interviewing some of the world's wisest people in search of answers to that question. Listen along as she offers three practices to help you make sense of what it means to be human right now — and how to live in a way that helps remake the world for the better.

Driven by the belief that businesses can — and should — invest in the communities around them, Intercorp founder and philanthropist Carlos Rodríguez-Pastor has built schools, pharmacies and a literal bridge to better serve Peru's growing middle class. In conversation with TED business curator Corey Hajim, he explores the immense possibility behind private-public partnerships — and his conviction that any individual can step up to create change.

Conceptual artist Tavares Strachan creates the kinds of projects that make you stop in your tracks, like a 4.5-ton block of Arctic ice he brought back to his birthplace in the Bahamas or a gold, Egyptian-inspired sculpture he launched into orbit around the Earth. Now he presents his latest creation, the Encyclopedia of Invisibility: a 3,000-page tome filled with more than 17,000 entries on people, places and events often left out of the history books — and encourages us all to unearth hidden stories before they disappear to the passage of time.

With birth rates falling, the worldwide human population is getting older and smaller. According to traditional thinking, this spells a future of labor shortages, bankrupt social security systems and overall economic collapse. Before you panic about the end of life as we know it, political demographer Jennifer D. Sciubba has a thoughtful playbook for managing the new normal – including ideas on the future of work and migration – and a reminder that a resilient future relies on present-day action.

Fifteen years ago, Uruguay was experiencing an energy crisis brought on by its reliance on fossil fuels; today, the nation produces 98 percent of its electricity from renewable sources (and even exports extra energy to neighboring countries). How did they turn things around so quickly? Uruguay's former secretary of energy, Ramón Méndez Galain, explains how they pulled off this unprecedented shift -- and shares how any other country can do the same.

You've probably heard of CRISPR, the revolutionary technology that allows us to edit the DNA in living organisms. Biochemist and 2023 Audacious Project grantee Jennifer Doudna earned the Nobel Prize for her groundbreaking work in this field -- and now she's here to tell us about its next world-changing advancement. She explains how her team at the Innovative Genomics Institute is pioneering a brand new field of science -- precision microbiome editing -- that uses CRISPR in an effort to solve seemingly insurmountable problems like asthma, Alzheimer's and climate change. (This ambitious idea is part of the Audacious Project, TED's initiative to inspire and fund global change.)

Your favorite pair of jeans -- the ones you refuse to throw out -- are actually a part of a global climate solution, says fashion entrepreneur Josephine Philips. When you value your existing clothes instead of chasing the latest trends, you help reduce waste and protect our planet for generations to come. Learn more about the impacts of what you wear -- and the incredible power of repairing your clothes.

The power sector generates the electricity that sustains modern life -- but it's also the number one contributor to climate change. We need a swift and equitable shift to renewable energy, says 2023 Audacious Project grantee and ReNew2030 executive director Rebecca Collyer. In conversation with TED's David Biello, she introduces a new coalition of governments, businesses and communities that aims to drastically scale wind and solar capacity in the 30 highest-emitting countries. Learn more about their plan -- and why Collyer has hope for a greener, more equitable future. (This ambitious idea is part of the Audacious Project, TED's initiative to inspire and fund global change.)

Sometimes the world's biggest issues can seem so intractable that meaningful change feels impossible. But what if the answer has been right in front of us all along? What if the answer is actually throwing money at the problems? In this thought-provoking talk, philanthropic advisor Natalie Cargill shares what might happen if we came together to spend 3.5 trillion dollars on fixing the world. And, yes, she also has a plan for where to get the money from. (Followed by a Q&A with Anna Verghese, executive director of The Audacious Project.)

Everyone loses their temper from time to time — but the stakes are dizzyingly high when the focus of your fury is your own child. Clinical psychologist and renowned parenting whisperer Becky Kennedy is here to help. Not only does she have practical advice to help parents manage the guilt and shame of their not-so-great moments but she also models the types of conversations you can have to be a better parent. (Hint: this works in all other relationships too.) Bottom line? It's never too late to reconnect.