The reasons why people become street paper vendors are many and diverse. Some are homeless; others suffer mental or physical health problems, struggle with addiction or face unemployment. And some people do it because the magazines offer them the refuge they so desperately need.

Think hand washing can’t be fun? Think again. In Senegal, a unique water system offers people an easy, cheap and environmentally friendly way to wash their hands frequently, reducing the spread of hand-borne transmittable diseases.

The world's eight nuclear states - the United States, Britain, Russia, France, China, India, Pakistan and Israel - collectively possess more than 20,500 nuclear weapons - a decline of over 2,000 since 2009.

The United Nations has largely overlooked the plight of indigenous peoples in developed countries, says Crystal Lee, a Native American activist from the Navajo tribe.

Al-Qaeda strategists have been assisting the Taliban fight against U.S.-NATO forces in Afghanistan because they believe that foreign occupation has been the biggest factor in generating Muslim support for uprisings against their governments, according to the just-published book by Syed Saleem Shahzad, the Pakistani journalist whose body was found in a canal outside Islamabad last week with evidence of having been tortured.

Edmary Mpagi and his cousin Fred Masembe were convicted by a Ugandan court and sentenced to death for the murder of a man who was later found alive.

Carlos Sánchez knows a lot about the fear faced by Mexican society today, because he crisscrosses the country in his job as a bus driver. But he feels that now he has begun to help fight it, driving one of the vehicles in the Peace and Justice Caravan headed by Mexican poet Javier Sicilia.

Developing countries, which have huge potential for growth and are home to the majority of the world’s people still living without electricity, will play a fundamental role in combating climate change, according to some experts.

Given that the world’s 40 biggest cities account for eight percent of the global population and 12 percent of global greenhouse gas emissions, local governments play an increasingly important role in confronting climate change.

As global greenhouse gas emissions rise instead of decreasing, forests play an even more crucial role in fighting global warming, since experts believe it will be impossible to prevent a disastrous increase in global temperature without drastically curbing deforestation.