Science Global greenhouse gas emissions continue to rise (+video)

Despite global talks to reduce greenhouse gas emissions, carbon dioxide production is up 3 percent in 2011, with three of the top five emitters being developing countries.

By , LiveScience

Alexander F. Yuan/AP

International talks to address human-caused global warming began 20 years ago in Rio de Janeiro. But despite attempts to curb emissions of the greenhouse gases responsible, they have continued to pour into the atmosphere since then.