Rebels fight Sudanese government troops in south Darfur
While violence is down from its peak in 2003 and 2004, new fighting has forced more than 130,000 people to flee their homes since the start of the year - UN
Colombia's palm oil boost must account for environment and human rights concerns
A new paper suggests palm oil giant Colombia may be able to better balance sustainability and output than others in the big league, but success depends on political will and robust monitoring of environmental impacts.