Michael Shellenberger is a global thinker on energy, technology and the environment.

Justin Hall-Tipping works on nano-energy startups -- mastering the electron to create power.

Richard Sears thinks hard about the post-oil world. He's a visiting scientist at MIT, after a long career as a VP at Shell.

Donald Sadoway is working on a battery miracle -- an inexpensive, incredibly efficient, three-layered battery using “liquid metal."

Kirk Sorensen stumbled across thorium while doing research on how to power a lunar community. Thorium is a cleaner, safer, and more abundant nuclear fuel -- one that Kirk believes will revolutionize how we produce our energy.

A legendary oil and gas entrepreneur, T. Boone Pickens is now on a mission to enhance U.S. energy policies to lessen the nation’s dependence on OPEC oil.

Steven Cowley directs the UK's leading fusion research center. Soon he'll helm new experiments that may make cheap fusion energy real on a commercial scale.

Larry Burns is the vice president of R&D for GM. His job? Find a new way to power cars.

In a lab near Vancouver, Michel Laberge and his team at General Fusion are building a prototype fusion reactor that mimics the processes of the sun to produce cheap, clean and abundant energy.

A former two-term governor of Michigan, Jennifer M. Granholm makes the case for empowering states to create jobs through a Clean Energy Jobs Race to the Top.

Shai Agassi wants to put you behind the wheel of an electric car -- but he doesn't want you to sacrifice convenience (or cash) to do it.

Alex Laskey helps power companies to help their customers cut down -- using data analysis, marketing and a pinch of psychology.

Daniel Schnitzer is the founder of EarthSpark International, a company dedicated to helping create clean energy supply chains in Haiti.

To power his family's home, young William Kamkwamba built an electricity-producing windmill from spare parts and scrap -- starting him on a journey detailed in the book and film "The Boy Who Harnessed the Wind."

Paul MacCready, an aircraft designer and environmentalist, is a pioneer of human-powered flight, alternative energy for transportation, and environmentally responsible design.

Joe Lassiter focuses on one of the world’s most pressing problems: developing clean, secure and carbon-neutral supplies of reliable, low-cost energy all around the world.

In his new book, "Reinventing Fire," Amory Lovins shares ingenious ideas for the next era of energy.

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.

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.

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

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.

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

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

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

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

Holly Morris tells the stories of women around the world through documentary, television, print and the web.

Susan Shaw is an internationally recognized marine toxicologist, author and explorer.

Rob Hopkins is the founder of the Transition movement, a radically hopeful and community-driven approach to creating societies independent of fossil fuel.

Climate researcher Alice Bows-Larkin connects her academic research to the broader policy context, helping create policies to deal with our changing planet.