WMO: 2011 one of hottest years on record
World Meteorological Organization says the warmest 13 years of average global temperatures have all occurred in the 15 years since 1997
PHOTO BLOG - Making mothers matter on World AIDS Day
On World AIDS Day the International HIV/AIDS Alliance is focusing attention on the impact HIV has on women and girls, writes Sarah West
Sudan sentences Darfur rebels to death-state media
A court has sentenced seven people accused of belonging to the rebel Justice and Equality Movement
Increasingly erratic climate menaces Africa's cocoa
Survival for small cocoa producers may depend on moving to higher, cooler places or breeding new varieties