Leaders from South America's Amazon nations have gathered in Colombia to agree on a joint plan to protect the rainforest.

Colombia's Constitutional Court on Wednesday annulled a controversial carbon credit deal in the Amazon rainforest, which six local tribes said had been signed without their consent.

In southern Colombia, a tribe of indigenous people, the Nasa Indians, have risen up after being caught in the crossfire of a government offensive against leftist guerrillas. In mid-July, hundreds ...