He's barreled headfirst into his task, visiting more than 100 countries; met world leaders and African warlords; had an Uzi pointed at his chest – and challenged the status quo.
She collects leftover crops from farmers' fields and delivers the fresh produce to food pantries and homeless shelters across North Carolina.
Bees play a crucial role in agriculture, helping to produce more than 30 percent of the world’s food supply. These organizations work to protect bees and keep them on the job.
The Peace Crane Project is an invitation to kids everywhere to write a poem or message – or draw or paint a picture – of peace. Then they fold it into an origami crane and fly it to the world.
Northeast Kansas needed a safe, inexpensive, way for its citizens to get around. A ride-sharing experiment shows a 21st-century version of hitchhiking may be an answer.
She launched Afghanistan Samsortya, a nonprofit designed to reverse decades of deforestation by planting fruit trees and teaching forestry skills.
The center has become a place where mothers and children, many of whom still live in temporary homes, can reconnect, share their experiences, and support one another.
David Gerson left his lucrative law practice to head Loaves and Fishes of Contra Costa, a nonprofit effort that provides free meals and other service to those in need.
Her Yoga Reaches Out charity has held Yogathons on both coasts and collected more than $1 million to help children and their families.
Conservation groups are mounting public service campaigns to persuade Vietnamese that buying rhino horn is decidedly uncool.
The physicist heads a new $5 million Georgetown Energy Prize that encourages midsize cities to develop innovative ways to slash energy use.
The effort, through its online portal at www.ustechvets.org, matches national and regional companies with veterans who have technical skills.
His nonprofit Pencils of Promise has built more than 170 schools in Ghana, Guatemala, Nicaragua, and Laos.
The athlete-adventurer co-founded a relay run called One Run for Boston that started in Los Angeles and ended at the marathon finish line to raise funds for victims.
Pop-ups allow new businesses to test having a storefront without investing in expensive long-term leases and infrastructure.
Frustrated by the inequality she experienced as a Navajo, Fleming founded Catapult Design to create new products and services for impoverished communities.
Growing seaweed rich in valuable chemicals — predicted to be worth $7 billion by 2018 — is emerging as a source of employment for rural women in India.
Participants on Instagram photograph, geotag, label, and then dispose of litter. By identifying litter, he hopes to drive companies to reevaluate the kind of packaging they use.
The Live Below the Line project April 28-May 2 aims to help people understand extreme poverty more personally by spending only $1.50 a day on food.
She's chief executive of Endeavor Global, a nonprofit group that gives a leg up to budding entrepreneurs.