In countries like Kenya and Tanzania, most people lack access to electricity. Wind turbines made from local scrap and a 'Netflix' model for distributing batteries may be solutions.
Young entrepreneurs find new ways to drive social change through founding businesses.
A host of companies and nonprofits are using technology – from smartphones to social networking – to make it easier for consumers to choose environmentally friendly products.
When his school bus driver collapsed, 13-year-old Jeremy Wuitschick grabbed the steering wheel and pulled the keys from the ignition.
Picking crops that would otherwise be left in a garden or field to rot, and sharing them with those in need, is a time-honored idea that's gaining fresh momentum today.
When victims go behind bars to talk with those who did them harm, they receive something the legal system doesn't provide: a chance to find real closure, maybe even forgiveness.
Brewing conflict with Sudan in the north, and Joseph Kony's LRA in the south, are just two of South Sudan's challenges. Nonviolent Peaceforce is working to protect the population, especially women and children, from these and other threats.
Scott Harrison, the founder of Charity: Water, takes an unconventional approach to bringing clean water to millions of people. Among his ideas: Put 100 percent of donations directly into projects – and look to entrepreneurs, not other charities, for great ideas.
Homes, hospitals, even prisons and golf courses may be built over the water as architects cope with rising sea levels that will affect coastal cities around the world.
Working at the Jim Casey Youth Opportunities Initiative she helps foster children make the transition to adulthood.
Co-ops worldwide represent much more than hippie grocery stores: They're a fast-growing way to do business better in fields from finance to agriculture to industry.
Osama Abu Ayyash visits Israeli classrooms, telling his story of loss and forbearance to humanize Palestinians to Israelis who may have never met one.
Institutions like India's Barefoot College, which teaches women how to run and repair solar installations, and projects like Microformers, which converts old microwave ovens into transformers, show ways to generate cheap electricity in poor regions.
Running its own electric utility will allow Boulder to use more sun and wind energy instead of coal – at the same or lower cost.
Combining rice paddles and fish ponds, and using locally caught fish as feed, are just two of the ways that fish farming, or aquaculture, can be made more environmentally friendly.
The charitable foundation of Michael Bloomberg, the New York mayor and anti-smoking activist, is giving $220 million to aid anti-tobacco efforts in low- and middle-income countries, where nearly 80 percent of the world’s smokers live.
Betty Oderwald has led an effort to restore the Powder House, one of Connecticut's few buildings connected to the War of 1812, now celebrating its bicentennial.
Eric Maddox created the Virtual Dinner Guest Project to bring people from different cultures together over a meal through a video link.
'The Hunger Games' stars Jennifer Lawrence, Josh Hutcherson, and Liam Hemsworth urge fans to fight hunger. But some fans are forming their own hunger campaign – 'Hunger is Not a Game' – using the hashtag #NotAGame.
Harnessing the bacteria naturally occurring in water and using solar energy are just two innovations that may help bring clean drinking water to the world's poor.