Africa's rapidly growing population projected to see urbanisation, economic growth, health and climate problems

From the Arctic sea ice to the Antarctic interior and the mountainous peaks of Peru, Alaska, and Tibet, ice is melting at an alarming rate. The accelerating loss of ice sheets, sea ice, and glaciers is one of the most powerful and striking indicators of a warming climate.

When the Intergovernmental Panel on Climate Change issued its last report in 2007, environmental tipping points were a footnote. A troubling footnote, to be sure, but the science was relatively new and unsettled. Straightforward global warming was enough to worry about.

Authors of the landmark 2009 climate report "The Copenhagen Diagnosis" estimate that by 2020 industrial nations must reduce their greenhouse gas em

By Matt Barringer, CNN Design Ever wondered how much carbon the world emits from the power it uses? The colored circles show each region's population and