'Good Samaritan' laws around the US and elsewhere shelter those giving aid in emergencies from prosecution and encourage good deeds.
High school junior Tatiana Grossman founded 'Spread the Words' to send books, both paper and digital, to schoolchildren in Africa.
Yale researcher Mark Brackett says helping students to develop empathy can make teachers more effective and students more successful.
Ensuring that women make their own choices about child-bearing and cutting waste are two important ways to ease the challenges of a more populous world.
Ryan Clinton helped make Austin, Texas, a 'no kill' zone for shelter animals. His next goal: The rest of the US.
Christian missionary Tim Peters sends aid to impoverished North Korea while working to help defectors come to the South.
New York-based nonprofit Bpeace provides a network of business professionals who volunteer to help entrepreneurs in conflict-affected countries such as Afghanistan, Rwanda, and El Salvador.
Harish Hande wants to make solar power available to all Indians – even the poorest street vendors.
Nigel Waller wants to bring 'virtual mobile phone' service to the Bottom of the Pyramid – the poorest of the world's poor.
Scientists are experimenting with growing meat directly from stem cells. Cost and quality questions remain, but 'artificial' meat could end animal slaughter and be easier on the environment.
Gary White cofounded Water.org with actor Matt Damon. His success secret: Making sure local people are deeply involved.
Jon Bon Jovi's new restaurant will help the hungry. But it's no 'soup kitchen,' he says.
Peter Frykman founded Driptech to provide low-cost drip-irrigation systems to small farmers, hiking their crop yields by 20 to 90 percent.
With world population expected to grow by 2 billion people by mid-century, supplies of clean water could be tight. But a new study suggests the key is not just how much water is available but how intelligently humanity uses it.
Tony Marren founded Operation Just One Can to make it easy for Americans to get involved in solving the problem of hunger in the United States.
Based in Zambia, Zambikes employs and empowers Africans to manufacture bicycles locally, including some made from bamboo.
Sze LaiShan aids the vulnerable underclass who live in poverty amid Hong Kong's vast wealth.
Author Jon Foley says feeding a growing world presents a huge challenge. But employing many strategies simultaneously can meet the problem.
In a poor area of El Paso, Texas, Rubí Orozco has pushed aside the junk food and reintroduced fresh, nutritious traditional Mexican dishes.
George Mukhobe coaches Uganda's Little League baseball, which has grown to nearly 1,500 boys and girls across this East African country. Is playing in the Little League World Series next?