In 2018, a single power plant produced more energy than the world's largest coal-powered and gas-powered plants combined. China's Three Gorges Dam relies on running water, and is capable of producing more energy than any other power plant on Earth. So what allows Three Gorges to generate all this power? And how do hydroelectric plants work in th...

The presence and visibility of a movement can often lead us to believe that progress is inevitable. But building power and changing the system requires more than conversations and retweets, says Rashad Robinson, the president of Color Of Change. To create material change in the racist systems that enable and perpetuate violence against Black com...

Our lives depend on curbing climate change, but so many priorities seem to be in competition. What's the most urgent thing humanity can do right now? Social entrepreneur James Irungu Mwangi tells us why Africa could be the ideal home for scaling the latest and most ambitious climate technologies -- including in places like Kenya's Hell's Gate Na...

Ralph Langner is a German control system security consultant. He has received worldwide recognition for his analysis of the Stuxnet malware.

How much land mass would renewables need to power a nation like the UK? An entire country's worth. In this pragmatic talk, David MacKay tours the basic mathematics that show worrying limitations on our sustainable energy options ... and explains why we should pursue them anyway.

Engineer and daredevil cave explorer Bill Stone is obsessed with discovery -- on Earth and beyond.

Fahad Al-Attiya's job is to maintain food security in Qatar, a country that has no water and imports 90 percent of its food.

At Stanford, Mark Z. Jacobson uses numerical models to study the effects of energy systems and vehicles on climate and air pollution, and to analyze renewable energy resources.

Unlike the solar cells you're used to seeing, organic photovoltaics are made of compounds that are dissolved in ink and can be printed and molded using simple techniques. The result is a low-weight, flexible, semi-transparent film that turns the energy of the sun into electricity. Hannah Bürckstümmer shows us how they're made -- and how they cou...

Joe Lassiter is a deep thinker and straight talker focused on developing clean, secure and carbon-neutral supplies of reliable, low-cost energy. His analysis of the world's energy realities puts a powerful lens on the stubbornly touchy issue of nuclear power, including new designs for plants that can compete economically with fossil fuels. We ha...

China is the world's biggest polluter -- and now one of its largest producers of clean energy. Which way will China go in the future, and how will it affect the global environment? Data scientist Angel Hsu describes how the most populous country on earth is creating a future based on alternative energy -- and facing up to the environmental catas...

What should you do with your paycheck? These talks offer reframes to help you save, spend and give — with intention.

John La Grou, a long-time electronics inventor, audio designer and entrepreneur, wants to save lives (and energy) with a new, smarter type of electrical outlet.

Taylor Wilson believes nuclear fusion is a solution to our future energy needs, and that kids can change the world. And he knows something about both of those: When he was 14, he built a working fusion reactor in his parents' garage. Now 17, he takes the TED stage at short notice to tell (the short version of) his story.

Entrepreneur Elon Musk is a man with many plans. The founder of PayPal, Tesla Motors and SpaceX sits down with TED curator Chris Anderson to share details about his visionary projects, which include a mass-marketed electric car, a solar energy leasing company and a fully reusable rocket.

Majd Mashharawi was walking through her war-torn neighborhood in Gaza when an idea flashed in her mind: What if she could take the rubble and transform it into building materials? See how she designed a brick made out of ashes that's helping people rebuild their homes -- and learn about her new project: bringing solar-powered energy to families ...

The Greeks had a simple and elegant formula for the universe: just earth fire wind and water. Turns out there's more to it than that -- a lot more. Visible matter (and that goes beyond the four Greek elements) comprises only 4% of the universe. CERN scientist James Gillies tells us what accounts for the remaining 96% (dark matter and dark energy...

What if we could use the cold darkness of outer space to cool buildings on earth? In this mind-blowing talk, physicist Aaswath Raman details the technology he's developing to harness "night-sky cooling" -- a natural phenomenon where infrared light escapes earth and heads to space, carrying heat along with it -- which could dramatically reduce th...

The Sun delivers more energy to Earth in one hour than all of humanity uses in an entire year. How can we make this power more accessible to everyone, everywhere? Solar designer Marjan van Aubel shows how she's turning everyday objects like tabletops and stained glass windows into elegant solar cells -- and shares her vision to make every surfac...

The coronavirus brought much of the world to a standstill, dropping carbon emissions by five percent. Al Gore says keeping those rates down is now up to us. In this illuminating interview, he discusses how the steadily declining cost of wind and solar energy will transform manufacturing, transportation and agriculture, offer a cheaper alternativ...

Paul MacCready -- aircraft designer, environmentalist, and lifelong lover of flight -- talks about his long career.

Bilal Bomani runs NASA’s Greenlab research facility, where he is developing the next generation of biofuels.

Solar-powered LED lightbulbs could transform the lives of rural Haitians, but as Daniel Schnitzer found, they don't simply sell themselves. At TEDxPittsburgh, he shows how smart health and energy products for the developing world are useless unless the market works too.

Reliable electricity remains a distant dream for too many people around the world and simply linking to the existing grid can be cost prohibitive. In this talk, Anil Raj proposes an alternative: micropower plants, small-scale renewable energy sources connected to a minigrid.

John La Grou unveils an ingenious new technology that will smarten up the electrical outlets in our homes, using microprocessors and RFID tags. The invention, Safeplug, promises to prevent deadly accidents like house fires -- and to conserve energy.

Elon Musk co-founded and leads Tesla, SpaceX, Neuralink and The Boring Company.

Every Google search or YouTube upload costs the global network both energy and resources. As Google's head of sustainability, it's Kate E. Brandt's job to strategize solutions that cut the cost on our environment and our economy. In an innovative talk, she dives into her plan to green up Google by creating a circular economy which reuses, recycl...

As an information theorist and computer scientist, David MacKay uses hard math to assess our renewable energy options.

Adam Grosser is a general partner at Foundation Capital -- and a refrigeration visionary.

At TED2010, Bill Gates unveils his vision for the world's energy future, describing the need for "miracles" to avoid planetary catastrophe and explaining why he's backing a dramatically different type of nuclear reactor. The necessary goal? Zero carbon emissions globally by 2050.