From Darkness to Light: How Lajolo, Omupo, Communities Thrive on Solar Power

Civic leaders in the U.S. struggle to effectively help their distressed neighborhoods. East Lake, Atlanta, created a replicable model that mixes residents of differing socio-economic status, and focuses on education and health in the area.

In Memphis, a creative blight-reduction initiative called 25 Square Blocks broke down the city into blocks. Inspectors were able to quickly identify all the violations and fix them, using the same amount of funding, but less time, as the old call-and-respond model.

Farmers in Vietnam face rising sea levels but rejected the city's water engineering projects. They prefer gradual measures to cope with climate change so scientists have allowed the farmers to steer the conversation.

Louisiana and Vietnam both need affordable solutions to rising sea levels. Leaders from Vietnam visited Louisiana to compare ideas.

Most insurance companies avoid insuring poor farmers because the transaction costs are too high, but a non-profit in Kenya created a sustainable way to cover them.

Native American student graduation rates are much lower than that of any other demographic. The Red Cloud school teaches students on a reservation in South Dakota about the Lakota history to empower the kids and encourage resilience.

The non-profit Root Capital created a lending initiative in Mexico which helps mid-size rural farmers gain access to capital, skills, and consumer markets from which they would otherwise be excluded.

Two columns on microconsignment, a new variation on microcredit that helps poor people living in developing countries - particularly women in rural villages - start small social businesses without taking on debt or requiring previous business skills. The organization, Soluciones Comunitarias, partners with a non-profit and a university student program to manage the supply chain and other components of the business necessary to support the social entrepreneurs in successful micro-ventures.

In a mountainous region of Lesotho, a man named Tsepo Kotelo visits 20 villages every week on his new motorcycle to provide health care to local villagers. The Elton John AIDS Foundation gifted the motorcycles to Kotelo and his colleagues, allowing them to increase the number of patients they visit by 600 percent. An organization called Riders for Health helps maintain the bikes, ensuring that remote villages will continue to receive medical care.

Ecological toilets that use natural composting to break down waste are simple to construct, waterless and are easy to fix. But as philanthropists are finding, getting these to those that need it most is harder than anticipated.