The UN estimates that 1.4 billion people have no access to electricity, hurting their ability to earn a living or educate their children. But connecting to an electric grid may not be the only solution.
The 'Kony 2012' online video, urging action against warlord Joseph Kony and his Lord's Resistance Army in Central Africa, works because it tells a simple story that makes the viewer the hero, an expert says.
Conservative philanthropy once helped dispel the stereotype of conservatives as uncaring or hardhearted by developing thoughtful private approaches to alleviating poverty. Why has it been abandoned today?
Three startup companies led by prominent scientists are working on new technologies to remove carbon dioxide (CO2) from the atmosphere. The scientific community is skeptical, but these entrepreneurs believe removing CO2 can eventually be profitable and help cool the planet.