Rachel Kyte works to mobilize finance and spur action along a critical path towards a resilient, inclusive and decarbonized world.

Heribert Watzke studies the brain in our gut -- and works to develop new kinds of food that will satisfy our bodies and minds.

TED Fellow Fariel Salahuddin works with smallholder farmers in developing countries, enabling them to use their livestock as currency.

John Marshall is changing the way people talk about climate change so that we can better understand and act against it.

Angela Belcher looks to nature for inspiration on how to engineer viruses to create extraordinary new materials.

Dan Jørgensen is the Minister for Climate, Energy and Utilities of Denmark, tasked with reducing the country’s emissions by 70 percent by 2030 and closing down its oil industry.

Harry Cliff looks for answers to questions about the origins of the universe and the laws of nature.

Lili Haydn brings fresh energy and a collaborative spirit to the violin.

Nigel Marsh presents and writes on business and personal life -- and how the two interact. He is the author of "Fat, Forty and Fired."

Patricia Burchat studies the structure and distribution of dark matter and dark energy. These mysterious ingredients can't be measured in conventional ways, yet form a quarter of the mass of our universe.

Miguel A. Modestino works to make industrial processes -- especially petrochemical -- greener and more sustainable.

Naomi Shah won the 2011 Google Science Fair in the age 15-16 category.

Majd Mashharawi leads a startup that makes bricks from recycled local materials -- and employs women in the Gaza Strip.

Fred Krupp is a leading voice on climate change, energy and sustainability, and a champion for harnessing the power of the marketplace to protect our environment.

Samir works to make business and technology climate solutions mainstream.

Josh Giegel developed the world's first autonomous, high-performance, electric mode of mass transportation.

Arunabha Ghosh is a public policy professional, adviser, author, columnist and institution builder.

Daniel Alexander Jones creates unique and ritualistic dramatic experiences through music, monologue and improvisation by channeling Jomama Jones, a mystical alter ego.

Former United States Congressman Bob Inglis promotes free enterprise action on climate change.

Jennifer Vail combines mechanical engineering and materials science to investigate interacting surfaces in relative motion.

A researcher and peacemaking practitioner with experience in conflict zones, Olivia Lazard knows that the fights for peace and for climate action are one and the same.

Kevin Surace is looking at the climate crisis from an engineer's perspective -- and creating products that prove there's no piece of our daily lives we can't redesign to be cleaner and greener.

Lisa Dyson thinks a new class of crops might help us reinvent agriculture -- and feed the world.

Philip Lubin studies the physics of the universe.

James Beacham is an experimental high-energy particle physicist working with the ATLAS collaboration at CERN's Large Hadron Collider.

LanzaTech CEO Jennifer Holmgren envisions a post-pollution future where we can choose where our carbon comes from and keep virgin fossil carbon in the ground.

Joachim de Posada was a speaker and motivational coach. He was the author of "How to Survive Among the Piranhas" and "Don't Eat the Marshmallow ... Yet."

Amar Inamdar works with businesses and entrepreneurs to imagine, create and grow markets that address our biggest social and environmental challenges.

Water is the basis of life, and too many people around the world suffer from waterborne illnesses. Deepika Kurup is working to change that.

Dr. Suzie Sheehy uses accelerator physics to help reinvent technology for applications in medicine, energy and beyond.