In El Salvador, this program lays out a path to escape gang violence

In the past, Los Angeles was a dangerous city fraught with gang wars. Lately, though, LA has become a safer city due to six changes enforced by the police cracking down on public violence and gangs.

A novel way to help young men growing up in communities in which concentrated poverty, violence and unemployment are well-documented barriers to health and longevity: male youth of color are trained to be the emergency response team to help stabilize street victims before doctors or nurses begin procedures.

Palm Beach County, Florida has many of the same social problems that Philadelphia has, including “gangs, drugs, and poverty.” However, their school system has managed to keep students safe by employing “safe-school case managers” who build relationships with students, and they offer a youth court that is a system run by students who peer-review cases of unrest. The initiatives in this county has prevented school violence from happening without metal detectors and just two police officers.

CitiStat has show great success in cities like Baltimore, where it has improved city services' efficiency (removing snow, fixing potholes, etc.). Many cities use Stat programs, but Baltimore has been a particular case of success. Looking at how it implemented its CitiStat program holds lessons for other cities.

The use of a gun in a violent crime can carry a penalty of 30 years or more in prison. High Point, NC, has been using call-ins for 16 years - a carrot-and-stick approach aimed at reducing violent crime and drugs in the city.

The company that manufactures Lifestraw, a water purification device, has found a way to distribute their product to impoverished Kenyan families for free, while still making a profit. In the global carbon credit market, businesses receive carbon credits for projects that reduce greenhouse gas emissions. These credits can then be sold to companies who need to offset their carbon emissions, allowing green companies to make a profit off of their small ecological footprint.

Attending college is not always a given option for gifted teenagers from less-than-wealthy backgrounds. National organization QuestBridge creates a way for low-income and minority high-achieving students to go to their dream colleges free of cost.

Lack of reading material is not only a third-world problem – many poor families in the United States lack access to and funds for books. A program that helps get books to into the homes of low-income families can boost literacy, and help publishers, too.

In combatting poverty, a giant informal economic system has quietly emerged in Africa. Women participate in micro-finance organizations that loan money in order to allow them to create businesses and become self-managing.

Colombia has attempted to decrease murder and homicide rates by setting up curfews for teenagers, forcing bars to close earlier in the evening, and creating gun laws to prevent the carrying of weapons. As a result of this epidemiological, data-driven approach, along with other governmental factors, the homicide rate has decreased significantly in most of the cities in which it was implemented.