Venezuela has one of the highest murder rates in the world, and illegal firearms are prevalent. More than 130,000 illegal arms were turned into the state last year as part of a pilot disarmament program.
Rural residents of Haiti most easily see the benefits of composting human waste, says Sasha Kramer, the co-founder of SOIL.
The Syrian opposition is disseminating video footage from the town of Daraya this weekend that tells of a government massacre that may have left more than 600 people dead.
From Seattle to Sweden, city and regional governments are using roof gardens, specially designed wetlands, and other forms of 'green infrastructure' to rein in pollution – and to save money.