News bites: What's eating Big Oil (profits)?

The Associated Press diagnoses what's caused a relative slump in profits for the world's largest oil firms.

Former GOP Environmental Protection Agency chiefs pen an op-ed in The New York Times to make "A Republican Case for Climate Action."

The Guardian urges the international community to aid people fleeing the Sahel, an arid region of Africa, due to intense drought linked to climate change.

The Guardian also touches on a study that explores the link between climate change and violence.

The AP notes a report on a March oil spill in Arkansas revealed the concerns had been raised about the ruptured pipeline's integrity as early as 1989.