Near Philadelphia, Erin Hurley finds adopted homes for retired race horses, saving them from a trip to the slaughterhouse.
Babar Ali, just a teenager himself, has started a free school in his parents' backyard for the poorest children in his village in India's West Bengal region.
Bassam al-Kadi heads the Syrian Women's Observatory, which aims to change the way both the government and the culture regard women in Syria.
For decades, missionary priest Sebastián Obermaier has built churches, schools, and clinics in the poor Bolivian boom town of El Alto.
Conflict negotiator and writer John Paul Lederach has spent decades seeking new paths to peacebuilding.
Satish Vijaykumar's The Sapling Project wants to plant 10,000 trees in Mumbai, where trees are losing out to rapid economic development, and then expand to the rest of India and beyond.
Avid sailor and educator Mary Crowley is recruiting help to clean up the North Pacific Trash Gyre, a 'garbage patch' of plastic and other trash in the middle of the Pacific Ocean.
Leslie Clark, a California artist, creates ‘fixed points’ along nomads' routes to bring health care and education to Niger.
When farmer and environmentalist Lynn Henning saw what factory farms were doing to the land and water, she decided to act.
By creating bear sanctuaries in Cambodia and India, Mary Hutton has kept endangered bears from being exploited in many cruel ways.
Terry Hodson, who now lives in South Africa, delivers food and offers comfort and advice to refugees from the troubles in neighboring Zimbabwe.
As a volunteer, Charlie Starbuck has helped to plant trees by the thousands on the streets of San Francisco, a city long on charm but short on leafy green trees.
Law school graduates Whitney Louchheim and Penelope Spain founded Mentoring Today, a Washington, DC program where volunteers are mentoring juveniles, trying to help keep them out of jail in the future.
Kansas City's 'mother of the streets' rises at 4:30 each morning, packs 400 decorated bags, and then seeks out the homeless.
The effects of war linger past the fighting, as Sara Terry found out herself when she documented a mass grave being dug up in Bosnia.
Decades after being imprisoned by North Korea on espionage charges, Dr. Kim Chin-Kyung is opening the first privately funded university in the north as a way to increase dialogue with the closed-off country.
He opened Posada Amazonas to tourists in 1996. By 2016, Peru's indigenous Eseeja community will operate the business by itself.
The conservation group, made up mostly of older women, helps the US government track illegal use of public lands in the US West.
The Coopa-Roca co-op, in one of Rio's poorest neighborhoods, sews high-fashion garments for international labels and designers.
Guillaume Saladin left his career as a professional acrobat to help young Inuits in northern Canada form Artcirq, their own performing troupe.
Iraqi war veteran Nico Marcolongo founded the ‘Buddy Bowl’ to benefit military veterans.