Why we're fans: The designer and engineer strives to bring solar power to cities, beautifying streets with the Solarflora, a towering flower sculpture with solar-panel petals.
Learn more about Darren Saravis's mission
Dr. Oz and Oprah look back at some of his most memorable moments. Poop questions, weight loss transformations and more! Plus, guests who say Dr. Oz saved their lives.
Oprah Radio host Jean Chatzky talks with Money magazine's Craig Matters about the top five small cities to live in the United States.
Get all the suggested missions to make every Monday truly matter.
Five years ago, Hurricane Katrina wiped out the life she knew. Now Melba Leggett-Barnes has a place to call her own again--a home that's good for her and the planet.